Table 1. Countries included in the study.
| Europe, North America, | ||
| Africa | Asia | and Oceania |
| Algeria | Bangladesh | Australia |
| Benin | China | Austria |
| Burkina Faso | India | Belgium |
| Burundi | Indonesia | Canada |
| Cameroon | Iran | Denmark |
| Central African Republic | Israel | Finland |
| Chad | Japan | France |
| Congo, Dem. Rep. | Korea, Rep. | Georgia |
| Congo, Rep. | Malaysia | Greece |
| Cote d'Ivoire | Nepal | Hungary |
| Egypt | Pakistan | Ireland |
| Ghana | Philippines | Italy |
| Kenya | Sri Lanka | Latvia |
| Liberia | Syrian Arab Republic | Mexico |
| Madagascar | Thailand | Netherlands |
| Malawi | New Zealand | |
| Mauritania | Latin America | Norway |
| Morocco | Argentina | Papua New Guinea |
| Niger | Bolivia | Portugal |
| Rwanda | Brazil | Spain |
| Senegal | Chile | Sweden |
| Sierra Leone | Colombia | Switzerland |
| South Africa | Costa Rica | United Kingdom |
| Sudan | Dominican Republic | United States |
| Togo | Ecuador | |
| Tunisia | El Salvador | |
| Zambia | Guatemala | |
| Zimbabwe | Haiti | |
| Honduras | ||
| Nicaragua | ||
| Panama | ||
| Paraguay | ||
| Peru | ||
| Uruguay | ||
| Venezuela |