28 December 2013

Mean years of schooling

Mean years of schooling (MYS), the average number of completed years of education of a population, is a widely used measure of a country's stock of human capital. Since 2010, MYS is used as one of two education indicators (the second education indicator is the school life expectancy) in the calculation of the Human Development Index (HDI) (UNDP, 2010).

A well-known data set with estimates of MYS was developed by Robert Barro and Jong-Wha Lee, two pioneers in this field of work. In 1993, Barro and Lee published an article describing their data set, which was partly derived from data on educational attainment by the Division of Statistics of UNESCO. Barro and Lee continue to update their data set, which is available at their website.

In December 2013, the UNESCO Institute for Statistics (UIS), the successor of the Division of Statistics of UNESCO, published its first estimates of MYS of the population aged 25 years and older. This indicator, used in the calculation of the HDI, had previously not been available in the database of the UIS. The UIS methodology is based on the approach by Barro and Lee. There are still important gaps in the UIS database but the UIS will attempt to fill them in the coming years.

The figure below summarizes the MYS estimates released by the UIS in December 2013. The UIS provides data for 103 countries and territories from the period 1996 to 2013. In the figure, only the latest available data are shown for each country. All countries are grouped by geographic region and sorted by MYS of the total population. As noted above, there are large gaps in the UIS database. For example, MYS estimates are only available for 13 of the 45 countries in sub-Saharan Africa. For two thirds of all countries, the MYS estimates are from 2007 or a later year but for the remaining countries, the most recent estimates are more than 6 years old. In spite of these gaps, some interesting patterns can be observed in the data.

MYS is highest (generally 8 years or more) in North America and Western Europe, Central Asia, and Central and Eastern Europe. Among the countries with data, the highest MYS was calculated for the United Kingdom in 2011: 13.8 years. By contrast, MYS values are lowest in sub-Saharan Africa and South Asia. In Burkina Faso, men and women 25 years and older completed on average less than one year of schooling.

Gender disparities, indicated by the difference between male and female MYS, are smallest in North America and Western Europe and in Central Asia, and largest in sub-Saharan Africa and in South and West Asia. In Pakistan, adult men had on average completed 3 more years of schooling than adult women in 2011 (6.2 years for men versus 3.1 years for women). In East Asia and the Pacific and in sub-Saharan Africa, the spread between the countries with the lowest and highest MYS is more than 10 years. In the Arab States, Central and Eastern Europe, Central Asia, and North America and Western Europe, the difference between the countries with the lowest and highest MYS is 6 years or less.

Mean years of schooling of the population 25 years and older, latest year available (click image to enlarge)

Note: Countries in each region sorted by MYS of total population.
Source: UIS Data Centre, December 2013, http://stats.uis.unesco.org.

The full data set with UIS estimates of MYS is available in the UIS Data Centre. The data set lists MYS values for the total, male and female population 25 years and older of 103 countries and territories, as well as the educational attainment data on which the MYS estimates are based.

  • Go to the UIS Data Centre at http://stats.uis.unesco.org.
  • Click on "Predefined Tables".
  • Click on "Literacy and Educational Attainment".
  • Click on "Mean years of schooling of population aged 25 years and older" to download an Excel file with all data.

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22 December 2013

Updated programs and guide to integrating Stata and external text editors

The rundo and rundolines programs for integrating Stata with an external text editor were updated to version 4.1 to be compatible with Stata 13. The user guide for the rundo and rundolines programs was also revised. Changes include:

  • All Stata references in the guide were updated to version 13.1, the most recent version as of December 2013.
  • The troubleshooting section was expanded.
  • All broken links in the user guide were repaired.
  • The formatting of the guide was modified so that it is retained when the blog translation tool is used to read the guide in a different language.

Stata/SE 13.1 program window
Stata/SE 13.1 program window

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30 November 2013

National literacy trends, 1985-2015

The report Adult and Youth Literacy: National, Regional and Global Trends, 1985-2015 by the UNESCO Institute for Statistics (UIS) provides literacy data for 151 countries for the years since 1985. In addition to historical data, the UIS report contains projections for 2015, the target year of Education for All and the Millennium Development Goals. Regional trends in adult literacy were discussed previously on this site. This article takes a closer look at national trends in adult and youth literacy.

Figures 1 and 2 present all national literacy data from the UIS database for the period 1985 to 2015 by region. Each line represents the data for one country. Single markers mean that only data for one year was available for a country. The first eight segments of each figure contain data for the countries within each region: Arab States, Central and Eastern Europe, Central Asia, East Asia and the Pacific, Latin America and the Caribbean, North America and Western Europe, South and West Asia, and sub-Saharan Africa. The "World" segment combines the data from all regions. In both figures, national trendlines are color coded according to the level of the earliest available literacy rate to facilitate distinguishing between individual countries and identifying the difference between the earliest and latest value for each country.

A comparison of adult literacy rates (for the population aged 15 years and older) in Figure 1 and youth literacy rates (for the population aged 15 to 24 years) in Figure 2 shows that youth literacy rates are generally higher than adult literacy rates. This is a reflection of the fact that younger generations are typically more likely to be able to read and write than older generations, except as countries reach universal literacy, as in Central and Eastern Europe, Central Asia, and North America and Western Europe. The spread between the countries with the lowest and highest literacy rates is also smaller for youths than for adults. In South and West Asia, for example, the adult literacy rate is expected to range from 60% in Pakistan to 99% in the Maldives in 2015. By comparison, the youth literacy rate is expected to range from 77% in Pakistan to nearly 100% in the Maldives in the same year. This increase in literacy rates over time can be observed in nearly all countries with data.

Please consult the report published by the UIS for further analysis of adult and youth literacy. The statistical annex of the report contains all national adult and youth literacy rates shown in Figures 1 and 2.

Figure 1: Adult literacy rate (population 15 years and older) by region and country, 1985-2015

Note: National trendlines are color coded according to the earliest value for each country.
Source: UNESCO Institute for Statistics (UIS). 2013. "Adult and Youth Literacy: National, Regional and Global Trends, 1985-2015". UIS information paper. Montreal: UIS. http://www.uis.unesco.org/Education/Documents/literacy-statistics-trends-1985-2015.pdf.

Figure 2: Youth literacy rate (population 15-24 years) by region and country, 1985-2015

Note: National trendlines are color coded according to the earliest value for each country.
Source: UNESCO Institute for Statistics (UIS). 2013. "Adult and Youth Literacy: National, Regional and Global Trends, 1985-2015". UIS information paper. Montreal: UIS. http://www.uis.unesco.org/Education/Documents/literacy-statistics-trends-1985-2015.pdf.

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27 October 2013

National, regional and global literacy trends, 1985-2015

The UNESCO Institute for Statistics (UIS) has released a new report on literacy (UIS 2013). The report, Adult and Youth Literacy: National, Regional and Global Trends, 1985-2015, contains a comprehensive overview of literacy data for 151 countries and territories from seven regions: Arab States, Central and Eastern Europe, Central Asia, East Asia and the Pacific, Latin America and the Caribbean, North America and Western Europe, South and West Asia, and sub-Saharan Africa. A summary of the most recent literacy rates and estimates of the illiterate population is accompanied by historical data for the period since 1985 and projections to 2015, the target year of Education for All and the Millennium Development Goals.

The table and figure below present adult literacy rates, for the population 25 years and older, at the regional and global level between 1990 and 2015. In spite of persistent illiteracy in some parts of the world - see the article "Adult and youth literacy in 2011" - the adult literacy rate has increased in all regions since 1990. The global adult literacy rate grew from 76% in 1990 to 82% in 2000 and 84% in 2011, the most recent year with data. (In the report, 1990 data refer to the period 1985-1994, 2000 data to the period 1995-2004, and 2011 data to the period 2005-2011.)

Progress at the regional level has varied. In three regions - Arab States, South and West Asia, and sub-Saharan Africa - approximately half of all adults were illiterate in 1990. In the Arab States, the adult literacy rate increased by 22% between 1990 and 2011. In South and West Asia, the adult literacy rate increased by 16% over the same period. In sub-Saharan Africa, progress was much more modest, with an increase in the adult literacy rate of only 6%. East Asia and the Pacific is approaching universal adult literacy, and Central and Eastern Europe and Central Asia were already near universal literacy in 1990. No regionally representative data are available for North America and Western Europe.

Adult literacy rate (population 25 years and older) by region, 1990-2015
Region Adult literacy rate (%)
1990 2000 2011 2015 projection 2015 target
Arab States 55.2 67.5 76.9 79.2 83.8
Central and Eastern Europe 96.0 97.4 98.5 98.0 98.7
Central Asia 97.9 99.0 99.5 99.6 99.5
East Asia and the Pacific 81.9 94.5 94.7 95.8 95.8
Latin America and the Caribbean 85.7 89.7 91.6 92.8 94.9
North America and Western Europe - - - - -
South and West Asia 46.7 58.9 62.8 70.4 79.5
Sub-Saharan Africa 53.2 57.2 59.1 63.6 78.6
World 75.7 81.9 84.1 86.1 91.0
Note: 1990 data are for the period 1985-1994, 2000 data are for 1995-2004, 2011 data are for 2005-2011.
Source: UNESCO Institute for Statistics (UIS). 2013. "Adult and Youth Literacy: National, Regional and Global Trends, 1985-2015". UIS information paper. Montreal: UIS. http://www.uis.unesco.org/Education/Documents/literacy-statistics-trends-1985-2015.pdf.

The EFA goals, adopted at the World Education Forum in Dakar in 2000, call for a "50% improvement in levels of adult literacy by 2015" (UNESCO 2005). For monitoring, this goal is typically interpreted to mean a reduction of the adult illiteracy rate by 50% between 2000 and 2015. EFA goals were set for countries, not regions, but for the analysis in the UIS report, target values were also calculated at the regional and global levels. At the global level, for example, halving adult illiteracy between 2000 and 2015 implies a target adult literacy rate of 91% for the year 2015.

Adult literacy rates are projected to increase in almost all regions between 2011 and 2015. The exception is Central and Eastern Europe, where projections indicate a small drop in adult literacy. The global adult literacy rate is projected to reach 86% in 2015, meaning that the target literacy rate would be missed by 5%. As the figure below shows, sub-Saharan Africa is projected to be furthest from the 2015 target, with an estimated adult literacy rate of 64%, 15% below the target of 79%. South and West Asia is projected to reach an adult literacy rate of 70% in 2015, 9% below the target for 2015. Central and Eastern Europe, Central Asia, and East Asia and the Pacific are projected to reach or come within one percentage point of the 2015 target.

Adult literacy rate (population 25 years and older) by region, 1990-2015

Notes: (1) Regions sorted by the projected literacy rate of the adult population in 2015. (2) 1990 data are for the period 1985-1994, 2000 data are for 1995-2004, 2011 data are for 2005-2011.
Source: UNESCO Institute for Statistics (UIS). 2013. "Adult and Youth Literacy: National, Regional and Global Trends, 1985-2015". UIS information paper. Montreal: UIS. http://www.uis.unesco.org/Education/Documents/literacy-statistics-trends-1985-2015.pdf.

The UIS report contains more detailed information on adult literacy rates and the adult illiterate population, youth literacy rates (for the population 15-24 years) and the youth illiterate population, historical trends and projections to 2015, a summary of UIS methodology in the area of literacy, and an annex with six statistical tables and 151 figures with national literacy data.

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08 September 2013

Adult and youth literacy in 2011

8 September is International Literacy Day, an occasion to reflect on the status of literacy worldwide. Globally, 84% of all adults 15 years and older were able to read and write in 2011, the most recent year for which the UNESCO Institute for Statistics (UIS) has released data (see Table 1). Two regions, Central and Eastern Europe and Central Asia, are near universal literacy, with adult literacy rates of 99% and 100%, respectively. Literacy rates are assumed to be at a similarly high level in North America and Western Europe but data coverage is insufficient for the calculation of a regional average. Literacy rates are also high in East Asia and the Pacific (95%) and in Latin America and the Caribbean (92%). In the remaining regions, adult literacy rates are below the global average: Arab States (77%), South and West Asia (63%), and sub-Saharan Africa (59%).

Male and female adult literacy rates are at nearly the same levels in three regions: Central and Eastern Europe, Central Asia, and Latin America and the Caribbean (see Table 1). In the Arab States, East Asia and the Pacific, South and West Asia, and sub-Saharan Africa, female literacy rates are lower than male literacy rates. The gender parity index (GPI), the ratio of the female over the male literacy rate, shows that the biggest gender gap exists in South and West Asia (GPI 0.70) and in sub-Saharan Africa (GPI 0.74). Globally, the male literacy rate is 89% and the female literacy rate 80%, which yields a GPI of 0.90, far below the range of gender parity with GPI values between 0.97 and 1.03.

Table 1: Adult and youth literacy rate, 2011
Region Adult literacy rate (%) Youth literacy rate (%)
Total Male Female GPI Total Male Female GPI
Arab States 76.9 84.7 68.4 0.81 89.9 93.2 86.5 0.93
Central and Eastern Europe 98.5 99.3 97.8 0.99 99.3 99.5 99.2 1.00
Central Asia 99.5 99.6 99.4 1.00 99.7 99.6 99.8 1.00
East Asia and the Pacific 94.7 96.9 92.5 0.95 98.9 98.9 98.8 1.00
Latin America and the Caribbean 91.6 92.2 90.9 0.99 97.1 96.8 97.4 1.01
North America and Western Europe - - - - - - - -
South and West Asia 62.8 74.0 51.9 0.70 80.7 86.8 74.9 0.86
Sub-Saharan Africa 59.1 68.1 50.6 0.74 69.5 75.6 63.7 0.84
World 84.1 88.6 79.9 0.90 89.5 92.2 86.8 0.94
Note: GPI = gender parity index.
Source: UNESCO Institute for Statistics, Data Centre, September 2013.

National adult literacy rates are displayed in Figure 1. Countries in sub-Saharan Africa and South and West Asia have generally lower literacy rates than countries in other regions. In 11 countries, nearly all in sub-Saharan Africa, fewer than half of all adults are able to read and write: Benin, Burkina Faso, Chad, Ethiopia, Guinea, Haiti, Liberia, Mali, Niger, Senegal, and Sierra Leone.

Figure 1: Adult literacy rate, 2011

Source: UNESCO Institute for Statistics, Data Centre, September 2013. - Click image to enlarge.

The UIS estimates that the adult illiterate population was 774 million in 2011 (see Table 2). Three out of four illiterate adults live in only two regions: South and West Asia (407 million) and sub-Saharan Africa (182 million). In all regions, the number of illiterate women is larger than the number of illiterate men. Globally, 493 million or two thirds of the adult illiterate population are female.

Table 2: Adult and youth illiterate population, 2011
Region Adult illiterate population (000) Youth illiterate population (000)
Total Male Female % female Total Male Female % female
Arab States 47,603 16,082 31,521 66.2 6,037 2,099 3,938 65.2
Central and Eastern Europe 4,919 1,104 3,815 77.5 386 157 229 59.4
Central Asia 290 108 182 62.7 45 30 14 32.5
East Asia and the Pacific 89,478 26,356 63,122 70.5 4,081 2,005 2,076 50.9
Latin America and the Caribbean 35,614 15,994 19,620 55.1 3,043 1,676 1,367 44.9
North America and Western Europe - - - - - - - -
South and West Asia 407,021 147,352 259,669 63.8 61,778 22,316 39,461 63.9
Sub-Saharan Africa 181,950 70,535 111,414 61.2 47,558 19,196 28,362 59.6
World 773,549 280,366 493,184 63.8 123,198 47,626 75,571 61.3
Source: UNESCO Institute for Statistics, Data Centre, September 2013.

The global youth literacy rate, for the population 15 to 24 years of age, was 90% in 2011 (see Table 1). Youth literacy rates are higher than adult literacy rates in all regions, a result of increased levels of school attendance among younger generations. Of the regions with data, four are near universal youth literacy: Central and Eastern Europe (99%), Central Asia (100%), East Asia and the Pacific (99%), and Latin America and the Caribbean (97%). In the Arab States, the youth literacy rate is 90%. In South and West Asia (81%) and sub-Saharan Africa (70%), the youth literacy rate is below the global average.

Literacy rates among the population 15-24 years are not only higher than among the total population 15 years and older, there is also a smaller gap between the literacy rates of young men and women (see Table 1). However, gender disparity in youth literacy is observed in the Arab States (GPI 0.93), South and West Asia (GPI 0.86), and sub-Saharan Africa (GPI 0.84); in these regions, young women are less likely to be able to read and write than young men. At the global level, the male youth literacy rate is 92% and the female youth literacy rate 87%.

National youth literacy rates are displayed in Figure 2. Sub-Saharan Africa stands out as the one region where youth literacy rates are significantly lower than in other regions. Seven countries have youth literacy rates below 50%: Benin, Burkina Faso, Chad, Guinea, Liberia, Mali, and Niger.

Figure 2: Youth literacy rate, 2011

Source: UNESCO Institute for Statistics, Data Centre, September 2013. - Click image to enlarge.

The youth illiterate population, a subset of the adult illiterate population, was estimated at 123 million in 2011 (see Table 2). Illiterate youth are concentrated in South and West Asia and sub-Saharan Africa; 89% of the global population of illiterate youth live in these two regions. Whereas women are the majority of illiterate adults in all regions, there is no such clear pattern among illiterate youth. In two regions, Central Asia and Latin America and the Caribbean, young men are more likely to lack basic reading and writing skills than young women. Even so, 61% of the global number of illiterate youth are female.

More detailed statistics and analysis are available from the the UNESCO Institute for Statistics, including a page with an interactive world map with adult and youth literacy rates, a fact sheet on adult and youth literacy, an infographic for International Literacy Day 2013, and a report on national, regional and global trends in adult and youth literacy between 1985 and 2015.

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