| 2012 | 2013 | 2014 | 2015 | 2016 | |
|---|---|---|---|---|---|
| Liberia | 0.00 | 0.00 | 0.00 | ||
| Dominican Republic | 0.86 | 2.15 | 1.82 | 2.70 | 2.33 |
| Cuba | 0.72 | 0.00 | 0.00 | 0.00 | |
| Republic of Korea | 0.00 | 0.00 | |||
| Switzerland | 0.00 | ||||
| Ghana | 1.05 | 0.00 | 0.84 | 1.20 | 0.00 |
| Afghanistan | 0.10 | 0.35 | 0.01 | 0.01 | 0.74 |
| Myanmar | 0.00 | 0.00 | 11.70 | 1.41 | |
| Burkina Faso | 4.90 | ||||
| Burundi | 0.47 | 1.09 | 1.55 | 0.00 | 1.15 |
| Zimbabwe | 4.35 | 0.00 | 10.00 | ||
| United Kingdom of Great Britain and Northern Ireland | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Thailand | 0.00 | 0.00 | 0.00 | 0.80 | 1.92 |
| Togo | 1.64 | 2.41 | 4.20 | 2.90 | |
| Iraq | 0.00 | 0.00 | 0.04 | 0.00 | |
| Uganda | 2.13 | 3.61 | 2.91 | 2.30 | 2.13 |
| South Sudan | 2.60 | 2.60 | 1.91 | ||
| France | 0.00 | 0.00 | |||
| Philippines | 0.80 | 0.00 | 0.18 | 0.00 | |
| Japan | 0.00 | 0.00 | 0.00 | 0.00 | |
| Australia | 0.00 | 0.00 | 0.00 | 0.00 | |
| Angola | 8.07 | 1.29 | 1.41 | 3.85 | |
| Nigeria | 3.02 | 3.47 | 2.10 | 3.50 | 4.17 |
| United Republic of Tanzania | 1.40 | 6.30 | 1.20 | 1.51 | |
| Malaysia | 0.40 | 0.58 | 0.75 | 0.80 | |
| Iran (Islamic Republic of) | 0.00 | 2.73 | 1.20 | ||
| China | 0.00 | 1.89 | 0.00 | 0.00 | 0.00 |
| Côte d'Ivoire | 4.48 | 3.57 | 5.11 | 3.00 | |
| Singapore | 0.00 | 0.00 | 0.00 | ||
| Somalia | 0.89 | 2.04 | 1.10 | 3.51 | |
| Senegal | 0.00 | ||||
| Sierra Leone | 1.29 | 8.49 | |||
| Sweden | 0.00 | ||||
| India | 0.90 | 0.52 | 0.40 | 0.36 | |
| Democratic Republic of the Congo | 2.43 | 1.82 | 1.68 | 1.40 | 2.70 |
| Benin | 0.48 | 1.14 | 1.44 | 1.71 | |
| Germany | 0.00 | ||||
| Kenya | 25.71 | 0.50 | 1.36 | ||
| Mexico | 0.00 | 0.53 | 0.00 | 0.00 | |
| Kuwait | 0.00 | ||||
| Congo | 3.13 | 13.61 | 13.33 | ||
| Central African Republic | 0.00 | ||||
| Chile | 0.00 | 0.00 | |||
| Mozambique | 1.08 | 1.02 | 0.21 | 0.70 | 0.23 |
| Spain | 0.00 | ||||
| Guinea | 1.81 | 10.03 | 0.00 | ||
| Niger | 2.08 | 2.22 | 3.89 | 7.80 | 15.79 |
| Bahrain | 0.00 | ||||
| Canada | 0.00 | 0.00 | 0.00 | 0.00 | |
| Cameroon | 1.38 | 0.00 | 5.48 | 4.80 | |
| Bahamas | 0.00 | ||||
| Norway | 0.00 | ||||
| Haiti | 0.80 | 1.01 | 1.07 | 0.90 | 1.08 |
| Guinea-Bissau | 0.72 | 2.89 | 18.18 | ||
| South Africa | 0.00 | ||||
| United States of America | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Venezuela (Bolivarian Republic of) | 0.00 | ||||
| Malawi | 1.07 | 1.60 | 2.57 | ||
| Mali | 8.68 | 8.70 | |||
| Russian Federation | 0.00 | 0.00 | |||
| Yemen | 1.04 | ||||
| Denmark | 0.00 | ||||
| Pakistan | 5.60 | 2.15 | 0.49 | ||
| Nepal | 0.00 | 0.21 | 0.00 | 0.00 | |
| Rwanda | 0.00 | 0.00 | |||
| Israel | 0.00 | ||||
| Italy | 0.00 | ||||
| Netherlands | 0.00 | ||||
| Oman | 0.00 | ||||
| Zambia | 1.01 |