| 2000 | 2005 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | |
|---|---|---|---|---|---|---|---|---|
| Fiji | 2.9 | 3.1 | 3.5 | 3.6 | 3.7 | 3.8 | 3.8 | 3.9 |
| Luxembourg | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 |
| Yemen | 2.9 | 3.3 | 4.1 | 4.2 | 4.4 | 4.5 | 4.6 | 4.8 |
| Afghanistan | 3.4 | 3.9 | 4.6 | 4.7 | 4.8 | 4.9 | 5.1 | 5.2 |
| India | 2.2 | 3.9 | 5.5 | 5.9 | 6.2 | 6.5 | 6.8 | 7.2 |
| Mauritius | 6.3 | 6.4 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 |
| Estonia | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |
| Djibouti | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 |
| Somalia | 7.4 | 7.2 | 7.1 | 7.0 | 7.0 | 7.0 | 6.9 | 6.9 |
| Kenya | 15.7 | 15.3 | 14.8 | 14.8 | 14.7 | 14.6 | 14.5 | 14.4 |
| Uganda | 7.0 | 7.7 | 8.3 | 8.4 | 8.6 | 8.7 | 8.8 | 9.0 |
| Switzerland | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Ukraine | 3.6 | 3.6 | 3.7 | 3.7 | 3.7 | 3.7 | 3.7 | 3.7 |
| Kazakhstan | 0.9 | 0.9 | 0.9 | 0.9 | 0.9 | 0.9 | 0.9 | 0.9 |
| Netherlands | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Senegal | 5.9 | 6.7 | 7.5 | 7.7 | 7.8 | 8.0 | 8.2 | 8.3 |
| Central African Republic | 3.7 | 3.8 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 |
| Jamaica | 11.0 | 11.2 | 11.4 | 11.4 | 11.4 | 11.5 | 11.5 | 11.5 |
| Chile | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| United Kingdom | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |
| Viet Nam | 2.6 | 3.1 | 3.6 | 3.7 | 3.8 | 3.9 | 4.0 | 4.2 |
| Mali | 5.4 | 6.8 | 8.2 | 8.5 | 8.8 | 9.0 | 9.3 | 9.6 |
| Timor-Leste | 6.9 | 7.1 | 7.2 | 7.2 | 7.3 | 7.4 | 7.4 | |
| Angola | 1.9 | 3.1 | 4.3 | 4.5 | 4.8 | 5.0 | 5.2 | 5.5 |
| Mozambique | 0.6 | 1.2 | 1.9 | 2.0 | 2.1 | 2.3 | 2.4 | 2.5 |
| Dominican Republic | 14.1 | 14.3 | 14.6 | 14.6 | 14.7 | 14.7 | 14.8 | 14.8 |
| Greece | 1.7 | 1.8 | 1.8 | 1.8 | 1.8 | 1.8 | 1.8 | 1.9 |
| Georgia | 1.0 | 0.9 | 0.9 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 |
| El Salvador | 5.4 | 5.6 | 6.1 | 6.2 | 6.3 | 6.4 | 6.5 | 6.6 |
| Slovakia | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 |
| France | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 |
| Congo | 8.8 | 8.8 | 8.8 | 8.8 | 8.8 | 8.8 | 8.8 | 8.8 |
| Saint Lucia | 7.0 | 7.2 | 7.7 | 7.8 | 8.0 | 8.0 | 8.0 | 8.0 |
| Côte d'Ivoire | 10.5 | 12.0 | 13.5 | 13.8 | 14.1 | 14.4 | 14.7 | 15.0 |
| Austria | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Costa Rica | 1.3 | 1.3 | 1.4 | 1.4 | 1.4 | 1.4 | 1.4 | 1.4 |
| Myanmar | 11.0 | 10.7 | 10.3 | 10.2 | 10.2 | 10.1 | 10.0 | 10.0 |
| Mauritania | 2.6 | 3.9 | 5.1 | 5.3 | 5.6 | 5.8 | 6.0 | 6.3 |
| Turkey | 2.0 | 2.2 | 2.4 | 2.4 | 2.5 | 2.5 | 2.6 | 2.6 |
| Niger | 1.1 | 1.8 | 2.4 | 2.5 | 2.6 | 2.8 | 2.9 | 3.0 |
| Nigeria | 12.7 | 11.7 | 10.8 | 10.6 | 10.4 | 10.2 | 10.0 | 9.8 |
| China | 2.6 | 2.8 | 2.9 | 3.0 | 3.0 | 3.0 | 3.1 | 3.1 |
| Montenegro | 1.6 | 1.6 | 1.6 | 1.7 | 1.7 | 1.7 | ||
| Sudan | 3.1 | 3.4 | 4.9 | 5.2 | 5.5 | 5.8 | 6.1 | 6.4 |
| Burkina Faso | 3.1 | 7.3 | 12.5 | 13.5 | 14.5 | 15.6 | 16.6 | 17.7 |
| Thailand | 3.2 | 3.2 | 3.2 | 3.2 | 3.2 | 3.2 | 3.2 | 3.2 |
| Belarus | 2.1 | 2.1 | 2.1 | 2.1 | 2.1 | 2.1 | 2.1 | 2.1 |
| Brunei Darussalam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | ||
| Lesotho | 0.8 | 3.0 | 5.2 | 5.6 | 6.0 | 6.5 | 6.9 | 7.4 |
| Namibia | 3.1 | 3.1 | 3.2 | 3.2 | 3.3 | 3.3 | 3.3 | 3.3 |
| The former Yugoslav Republic of Macedonia | 4.6 | 4.6 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 |
| Benin | 5.8 | 7.0 | 8.2 | 8.4 | 8.6 | 8.9 | 9.1 | 9.3 |
| Solomon Islands | 1.6 | 1.7 | 2.0 | 2.1 | 2.1 | 2.2 | 2.2 | 2.3 |
| South Sudan | 4.6 | 5.1 | 5.7 | 6.2 | 6.8 | |||
| Panama | 4.4 | 4.8 | 5.3 | 5.4 | 5.5 | 5.6 | 5.7 | 5.8 |
| Gabon | 20.8 | 20.4 | 20.0 | 19.9 | 19.8 | 19.7 | 19.6 | 19.5 |
| Romania | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | ||
| Tunisia | 6.9 | 7.9 | 9.0 | 9.2 | 9.5 | 9.7 | 9.9 | 10.1 |
| Cameroon | 10.2 | 9.3 | 8.3 | 8.1 | 7.9 | 7.8 | 7.6 | 7.4 |
| Tajikistan | 2.2 | 2.3 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 |
| Latvia | 0.4 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
| Germany | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 |
| Egypt | 5.3 | 5.3 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 |
| Honduras | 3.7 | 4.4 | 5.0 | 5.1 | 5.2 | 5.4 | 5.5 | 5.6 |
| Cabo Verde | 1.3 | 1.9 | 2.5 | 2.6 | 2.7 | 2.8 | 2.8 | 2.9 |
| Sri Lanka | 1.6 | 1.7 | 1.8 | 1.8 | 1.8 | 1.8 | 1.8 | 1.8 |
| Bangladesh | 8.9 | 12.2 | 15.5 | 16.1 | 16.8 | 17.4 | 18.1 | 18.8 |
| Iran (Islamic Republic of) | 17.0 | 17.0 | 17.0 | 17.0 | 16.9 | 16.9 | 16.9 | 16.9 |
| Belgium | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
| Poland | 0.6 | 0.6 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.8 |
| Bulgaria | 16.3 | 16.3 | 16.3 | 16.3 | 16.3 | 16.3 | 16.3 | 16.3 |
| Papua New Guinea | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 |
| Colombia | 3.8 | 4.4 | 4.9 | 5.0 | 5.1 | 5.2 | 5.4 | 5.5 |
| Andorra | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Ecuador | 5.4 | 6.3 | 7.2 | 7.4 | 7.6 | 7.7 | 7.9 | 8.1 |
| Comoros | 3.8 | 4.2 | 4.6 | 4.7 | 4.8 | 4.9 | 4.9 | 4.9 |
| Gambia | 22.4 | 19.5 | 16.5 | 15.9 | 15.3 | 14.7 | 14.1 | 13.5 |
| Cambodia | 0.7 | 3.0 | 5.2 | 5.6 | 6.1 | 6.5 | 6.9 | 7.4 |
| Vanuatu | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 |
| Albania | 2.2 | 2.4 | 2.5 | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 |
| Algeria | 9.9 | 10.3 | 10.8 | 10.9 | 10.9 | 11.0 | 11.1 | 11.2 |
| United Arab Emirates | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Malta | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Cyprus | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Nicaragua | 1.8 | 2.0 | 2.3 | 2.3 | 2.3 | 2.4 | 2.4 | 2.5 |
| Guinea | 3.7 | 8.0 | 12.4 | 13.3 | 14.2 | 15.1 | 15.9 | 16.8 |
| Republic of Moldova | 5.6 | 5.9 | 6.2 | 6.2 | 6.3 | 6.4 | 6.4 | 6.5 |
| Guinea-Bissau | 2.2 | 3.0 | 3.8 | 3.9 | 4.1 | 4.2 | 4.4 | 4.6 |
| Haiti | 7.1 | 10.0 | 12.9 | 13.5 | 14.1 | 14.7 | 15.2 | 15.2 |
| Spain | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Czech Republic | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 |
| Finland | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
| Philippines | 13.5 | 14.5 | 15.5 | 15.7 | 15.9 | 16.1 | 16.3 | 16.5 |
| Italy | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | ||
| Democratic Republic of the Congo | 15.6 | 14.6 | 13.7 | 13.5 | 13.3 | 13.1 | 12.9 | 12.7 |
| Sao Tome and Principe | 3.3 | 4.3 | 5.3 | 5.5 | 5.7 | 5.9 | 6.0 | 6.2 |
| Armenia | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Botswana | 9.0 | 9.5 | 9.9 | 10.0 | 10.1 | 10.2 | 10.2 | 10.2 |
| Pakistan | 2.6 | 4.7 | 6.8 | 7.2 | 7.6 | 8.1 | 8.5 | 8.9 |
| Lithuania | 1.9 | 2.1 | 2.3 | 2.3 | 2.3 | 2.4 | 2.4 | 2.4 |
| Togo | 7.8 | 8.0 | 8.1 | 8.1 | 8.2 | 8.2 | 8.2 | 8.2 |
| Malaysia | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Swaziland | 16.7 | 18.0 | 19.4 | 19.6 | 19.9 | 20.2 | 20.4 | 20.7 |
| Serbia | 1.3 | 1.3 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 |
| Palau | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Maldives | 1.2 | 1.4 | 1.7 | 1.7 | 1.7 | 1.7 | 1.7 | 1.7 |
| Russian Federation | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Venezuela (Bolivarian Republic of) | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Kyrgyzstan | 1.3 | 1.3 | 1.3 | 1.3 | 1.4 | 1.4 | 1.4 | 1.4 |
| Guatemala | 5.7 | 6.1 | 6.6 | 6.7 | 6.8 | 6.8 | 6.9 | 7.0 |
| Norway | 1.7 | 1.7 | 1.7 | 1.7 | 1.7 | 1.7 | 1.7 | 1.7 |
| South Africa | 6.4 | 7.5 | 8.7 | 8.9 | 9.1 | 9.4 | 9.6 | 9.8 |
| Tonga | 1.0 | 1.0 | 1.0 | 1.0 | 1.1 | 1.1 | 1.1 | 1.1 |
| Malawi | 15.6 | 17.2 | 18.8 | 19.1 | 19.4 | 19.7 | 20.1 | 20.4 |
| Portugal | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
| Croatia | 2.1 | 2.1 | 2.1 | 2.1 | 2.1 | 2.1 | 2.1 | 2.1 |
| Marshall Islands | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | |
| Eritrea | 0.4 | 0.8 | 1.3 | 1.4 | 1.5 | 1.5 | 1.5 | 1.5 |
| Rwanda | 5.7 | 6.7 | 7.7 | 7.9 | 8.1 | 8.3 | 8.5 | 8.7 |
| Burundi | 5.4 | 5.8 | 6.2 | 6.2 | 6.3 | 6.4 | 6.5 | 6.5 |
| Mongolia | 18.3 | 21.9 | 25.5 | 26.2 | 27.0 | 27.7 | 28.2 | 28.4 |
| Kiribati | 2.7 | 3.3 | 3.9 | 4.0 | 4.1 | 4.1 | 4.1 | 4.1 |
| Democratic People's Republic of Korea | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | |
| Madagascar | 3.8 | 5.6 | 7.4 | 7.8 | 8.1 | 8.5 | 8.9 | 9.2 |
| Argentina | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Ghana | 31.3 | 36.0 | 40.7 | 41.6 | 42.6 | 43.5 | 44.4 | 45.4 |
| United States of America | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Bolivia (Plurinational State of) | 4.0 | 4.7 | 5.4 | 5.6 | 5.7 | 5.8 | 6.0 | 6.1 |
| Micronesia (Federated States of) | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |||
| Tuvalu | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| United Republic of Tanzania | 1.2 | 2.1 | 3.0 | 3.2 | 3.4 | 3.6 | 3.7 | 3.9 |
| Liberia | 12.3 | 14.5 | 16.8 | 17.2 | 17.6 | 18.1 | 18.5 | 19.0 |
| Slovenia | 0.9 | 0.9 | 0.9 | 0.9 | 0.9 | 0.9 | 0.9 | 0.9 |
| Nepal | 5.1 | 8.2 | 11.4 | 12.0 | 12.6 | 13.2 | 13.9 | 14.5 |
| Jordan | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 |
| Morocco | 3.0 | 3.6 | 4.1 | 4.2 | 4.3 | 4.5 | 4.6 | 4.7 |
| Suriname | 11.3 | 11.2 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 |
| Turkmenistan | 0.9 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 |
| Guyana | 8.6 | 9.0 | 9.3 | 9.4 | 9.5 | 9.6 | 9.6 | 9.7 |
| Equatorial Guinea | 6.6 | 6.3 | 6.1 | 6.0 | 5.9 | 5.9 | 5.9 | 5.9 |
| Bhutan | 3.5 | 3.8 | 4.1 | 4.1 | 4.2 | 4.2 | 4.3 | 4.4 |
| New Zealand | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Denmark | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 |
| Uzbekistan | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Oman | 0.5 | 0.6 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 |
| Cuba | 5.5 | 5.7 | 5.9 | 5.9 | 6.0 | 6.0 | 6.0 | 6.1 |
| Zimbabwe | 17.3 | 16.7 | 15.9 | 15.8 | 15.6 | 15.5 | 15.3 | 15.2 |
| Bosnia and Herzegovina | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 |
| Zambia | 4.5 | 5.2 | 5.9 | 6.0 | 6.2 | 6.3 | 6.5 | 6.6 |
| Brazil | 0.6 | 0.7 | 0.8 | 0.8 | 0.8 | 0.9 | 0.9 | 0.9 |
| Azerbaijan | 1.5 | 1.8 | 2.1 | 2.2 | 2.3 | 2.3 | 2.4 | 2.4 |
| Uruguay | 1.9 | 1.9 | 2.0 | 2.0 | 2.0 | 2.1 | 2.1 | 2.1 |
| Peru | 1.7 | 2.4 | 3.2 | 3.3 | 3.5 | 3.6 | 3.8 | 3.9 |
| Ireland | 4.5 | 4.6 | 4.6 | 4.6 | 4.6 | 4.7 | 4.7 | 4.7 |
| Indonesia | 7.1 | 9.6 | 12.0 | 12.5 | 13.0 | 13.4 | 13.9 | 14.4 |
| Samoa | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Syrian Arab Republic | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 |
| Chad | 1.8 | 1.5 | 1.1 | 1.1 | 1.0 | 1.0 | 0.9 | 0.8 |
| Israel | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Belize | 9.8 | 10.0 | 10.3 | 10.3 | 10.3 | 10.4 | 10.4 | 10.5 |
| Paraguay | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Iraq | 5.6 | 6.9 | 8.1 | 8.3 | 8.6 | 8.8 | 8.8 | 8.8 |
| Sierra Leone | 12.6 | 16.8 | 20.9 | 21.7 | 22.6 | 23.4 | 24.2 | 25.0 |
| Mexico | 4.9 | 5.9 | 6.9 | 7.1 | 7.3 | 7.5 | 7.7 | 7.9 |
| Sweden | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.3 | 0.3 | 0.3 |
| Ethiopia | 0.3 | 0.6 | 0.9 | 1.0 | 1.1 | 1.1 | 1.2 | 1.2 |
| Hungary | 1.4 | 1.4 | 1.4 | 1.4 | 1.4 | 1.4 | 1.4 | 1.4 |
| Iceland | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |