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Descriptive classification of the study countries (n = 136 countries)
| Region | N (%) | Total number of countries by region, % included in the analysis by region |
|---|---|---|
| Africa | 46 (33.8) | 57 (80.7) |
| Asia | 39 (28.7) | 50 (78.0) |
| Europe | 25 (18.4) | 51 (49.0) |
| Latin America and the Caribbean | 21 (15.4) | 48 (43.8) |
| North America | 2 (1.5) | 5 (40.0) |
| Oceania | 3 (2.2) | 25 (12.0) |
| Total | 136 (100.0) | 236 |
