Table 1.
Fertility surveys included in the analysis according to date of fieldwork and region
| Period | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Region and Subregion | 1975–1979 | 1980–1984 | 1985–1989 | 1990–1994 | 1995–1999 | 2000–2004 | 2005–2009 | 2010–2014 | 2015–2019 | Total |
| Sub-Saharan Africa | 5 | 4 | 9 | 16 | 22 | 21 | 22 | 34 | 11 | 144 |
| East | 1 | 1 | 4 | 7 | 9 | 10 | 7 | 12 | 6 | 57 |
| Middle | 1 | 0 | 0 | 2 | 2 | 3 | 3 | 5 | 1 | 17 |
| Southern | 1 | 0 | 0 | 1 | 1 | 2 | 3 | 2 | 1 | 11 |
| West | 2 | 3 | 5 | 6 | 10 | 6 | 9 | 15 | 3 | 59 |
| Latin America and Caribbean | 10 | 1 | 9 | 10 | 13 | 12 | 11 | 8 | 2 | 76 |
| Caribbean | 3 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 17 |
| Central America | 2 | 0 | 3 | 2 | 4 | 4 | 4 | 2 | 0 | 21 |
| South America | 5 | 0 | 4 | 6 | 7 | 6 | 5 | 4 | 1 | 38 |
| Middle East and North Africa | 5 | 2 | 4 | 5 | 3 | 4 | 3 | 3 | 0 | 29 |
| East Europe and Central Asia | 0 | 0 | 0 | 0 | 4 | 1 | 5 | 3 | 3 | 16 |
| South and Southeast Asia | 7 | 0 | 3 | 6 | 7 | 6 | 9 | 8 | 6 | 52 |
| South Asia | 4 | 0 | 1 | 3 | 4 | 2 | 5 | 4 | 3 | 26 |
| Southeast Asia | 3 | 0 | 2 | 3 | 3 | 4 | 4 | 4 | 3 | 26 |
| Total | 27 | 7 | 25 | 37 | 49 | 44 | 50 | 56 | 22 | 317 |