Top contributing surveyed regions and country groups
| Regions | 1994–99 | 2000–04 | 2005–09 | 2010–14 | 2015–19 | 2020–24 | Total |
|---|---|---|---|---|---|---|---|
| Europe (Geographic Europe, excluding the UK) | 2 | 3 | 3 | 9 | 15 | 13 | 45 |
| Across regions (Comparative/global studies spanning two or more regions) | – | – | 3 | 1 | 3 | 5 | 12 |
| Africa (all African sub-regions) | – | – | – | 2 | 1 | 4 | 7 |
| Developing countries (Multi-country samples restricted to low- and middle-income economies (World Bank classification) | 1 | – | 1 | 2 | 2 | 6 | 12 |
| Americas (North, Central, and South America, including the Caribbean) | 1 | 4 | 1 | 8 | 8 | 10 | 32 |
| Asia (West, South, Southeast, East, and Central Asia) | – | – | 1 | 5 | 7 | 8 | 21 |
| BRICS countries (Brazil, Russia, India, China, and South Africa) | 1 | – | 1 | 4 | 6 | 8 | 20 |
| UK (United Kingdom) | – | 1 | 1 | 1 | 2 | 3 | 8 |
| Eurasia (Post-Soviet states in the Caucasus and Central Asia) | – | – | 1 | – | 1 | 2 | 4 |
| Total | 5 | 8 | 12 | 32 | 45 | 59 | 161 |
| Regions | 1994–99 | 2000–04 | 2005–09 | 2010–14 | 2015–19 | 2020–24 | Total |
|---|---|---|---|---|---|---|---|
| Europe (Geographic Europe, excluding the UK) | 2 | 3 | 3 | 9 | 15 | 13 | 45 |
| Across regions (Comparative/global studies spanning two or more regions) | – | – | 3 | 1 | 3 | 5 | 12 |
| Africa (all African sub-regions) | – | – | – | 2 | 1 | 4 | 7 |
| Developing countries (Multi-country samples restricted to low- and middle-income economies (World Bank classification) | 1 | – | 1 | 2 | 2 | 6 | 12 |
| Americas (North, Central, and South America, including the Caribbean) | 1 | 4 | 1 | 8 | 8 | 10 | 32 |
| Asia (West, South, Southeast, East, and Central Asia) | – | – | 1 | 5 | 7 | 8 | 21 |
| BRICS countries (Brazil, Russia, India, China, and South Africa) | 1 | – | 1 | 4 | 6 | 8 | 20 |
| UK (United Kingdom) | – | 1 | 1 | 1 | 2 | 3 | 8 |
| Eurasia (Post-Soviet states in the Caucasus and Central Asia) | – | – | 1 | – | 1 | 2 | 4 |
| Total | 5 | 8 | 12 | 32 | 45 | 59 | 161 |
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