| 2000 | 2005 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | |
|---|---|---|---|---|---|---|---|---|
| Greece | 95.9 | 97.6 | 99.3 | 99.7 | 100.0 | 100.0 | 100.0 | 100.0 |
| Chad | 6.9 | 7.6 | 8.3 | 8.5 | 8.6 | 8.8 | 8.9 | 9.0 |
| Mauritania | 14.9 | 21.5 | 28.2 | 29.5 | 30.8 | 32.1 | 33.5 | 34.8 |
| Bangladesh | 0.3 | 0.8 | 1.4 | 1.5 | 1.6 | 1.7 | 1.8 | 1.9 |
| Iraq | 41.0 | 49.0 | 57.1 | 58.7 | 60.3 | 61.9 | 63.5 | 65.1 |
| Slovakia | 91.4 | 94.5 | 98.3 | 99.1 | 99.9 | 100.0 | 100.0 | 100.0 |
| El Salvador | 43.6 | 54.2 | 64.8 | 66.9 | 69.0 | 71.1 | 73.2 | 75.3 |
| Netherlands | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Argentina | 93.7 | 95.7 | 97.7 | 98.1 | 98.5 | 98.5 | 99.3 | 99.3 |
| Egypt | 79.3 | 85.4 | 91.4 | 92.6 | 93.8 | 95.0 | 96.2 | 97.4 |
| Maldives | 16.4 | 6.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Malta | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Philippines | 31.6 | 31.5 | 31.4 | 31.3 | 31.3 | 31.3 | 31.3 | 31.2 |
| Bhutan | 71.7 | 80.6 | 91.7 | 94.0 | 96.2 | 98.4 | 100.0 | 100.0 |
| Brazil | 50.8 | 60.2 | 69.5 | 71.4 | 73.3 | 75.1 | 77.0 | 78.9 |
| Mozambique | 5.8 | 8.1 | 10.4 | 10.8 | 11.3 | 11.7 | 12.2 | 12.7 |
| Guinea-Bissau | 14.0 | 9.4 | 4.8 | 3.8 | 2.9 | 2.9 | 2.9 | 2.9 |
| Zimbabwe | 13.4 | 12.3 | 10.9 | 10.6 | 10.3 | 10.0 | 9.7 | 9.4 |
| Indonesia | 6.8 | 7.6 | 8.5 | 8.7 | 8.8 | 9.0 | 9.2 | 9.4 |
| Papua New Guinea | 12.7 | 12.7 | 12.7 | 12.7 | 12.7 | 12.7 | 12.7 | 12.7 |
| Iceland | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Honduras | 64.3 | 69.9 | 75.6 | 76.7 | 77.9 | 79.0 | 80.1 | 81.2 |
| South Africa | 58.3 | 63.8 | 69.4 | 70.5 | 71.6 | 72.7 | 73.8 | 75.0 |
| Denmark | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Romania | 17.4 | 23.0 | 28.7 | 28.7 | 28.7 | 28.7 | 28.7 | |
| Colombia | 51.7 | 55.5 | 59.4 | 60.2 | 60.9 | 61.7 | 62.5 | 63.3 |
| Portugal | 98.1 | 98.7 | 99.3 | 99.5 | 99.6 | 99.7 | 99.7 | 99.7 |
| Namibia | 60.5 | 57.7 | 54.8 | 54.2 | 53.6 | 53.1 | 52.5 | 51.9 |
| Nigeria | 6.5 | 6.7 | 6.9 | 7.0 | 7.0 | 7.0 | 7.1 | 7.1 |
| Croatia | 72.0 | 81.5 | 93.4 | 95.8 | 98.2 | 99.4 | 99.6 | 99.6 |
| Venezuela (Bolivarian Republic of) | 49.5 | 50.5 | 51.4 | 51.6 | 51.8 | 52.0 | 52.0 | 52.0 |
| Bosnia and Herzegovina | 76.8 | 79.9 | 83.1 | 83.7 | 84.3 | 85.0 | 85.6 | 85.6 |
| United Arab Emirates | 70.8 | 70.8 | ||||||
| Montenegro | 69.1 | 68.6 | 68.1 | 67.5 | 67.0 | 66.5 | ||
| Turkey | 79.6 | 86.9 | 94.3 | 95.7 | 97.2 | 98.2 | 99.0 | 99.6 |
| Bulgaria | 88.4 | 92.1 | 95.7 | 96.5 | 97.2 | 97.9 | 98.7 | 98.7 |
| Burundi | 8.3 | 14.3 | 20.3 | 21.5 | 22.7 | 23.9 | 25.1 | 25.1 |
| Israel | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Ukraine | 49.3 | 41.5 | 33.7 | 32.2 | 30.6 | 29.1 | 27.5 | 25.9 |
| Samoa | 85.4 | 85.3 | 84.6 | 84.4 | 84.3 | 84.2 | 84.0 | 83.9 |
| Yemen | 34.6 | 32.0 | 27.8 | 27.0 | 26.1 | 25.3 | 24.4 | 23.6 |
| Switzerland | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Sao Tome and Principe | 63.6 | 69.3 | 75.0 | 76.1 | 77.2 | 78.4 | 79.5 | 80.6 |
| Tonga | 97.0 | 97.0 | 96.8 | 96.8 | 96.7 | 96.7 | 96.6 | 96.6 |
| South Sudan | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | |||
| Senegal | 30.4 | 39.8 | 49.2 | 51.1 | 53.0 | 54.9 | 56.8 | 58.7 |
| Vanuatu | 40.9 | 39.3 | 31.4 | 29.8 | 28.2 | 26.7 | 25.1 | 23.5 |
| Malawi | 12.5 | 11.7 | 10.9 | 10.7 | 10.5 | 10.4 | 10.2 | 10.0 |
| Micronesia (Federated States of) | 35.9 | 35.9 | 35.9 | 35.9 | 35.9 | |||
| Comoros | 37.7 | 43.2 | 48.7 | 49.8 | 50.9 | 52.0 | 53.1 | 53.1 |
| Burkina Faso | 9.3 | 7.8 | 6.0 | 5.6 | 5.3 | 4.9 | 4.5 | 4.2 |
| Côte d'Ivoire | 23.3 | 24.3 | 25.3 | 25.5 | 25.7 | 25.9 | 26.1 | 26.3 |
| Dominican Republic | 56.3 | 59.2 | 62.0 | 62.6 | 63.2 | 63.7 | 64.3 | 64.9 |
| Albania | 61.9 | 67.4 | 73.0 | 74.1 | 75.2 | 76.3 | 77.4 | 77.4 |
| Liberia | 4.0 | 2.3 | 0.6 | 0.2 | 0.0 | 0.0 | 0.0 | 0.0 |
| Morocco | 18.6 | 29.0 | 39.4 | 41.5 | 43.5 | 45.6 | 47.7 | 49.8 |
| Peru | 33.7 | 42.6 | 51.4 | 53.2 | 55.0 | 56.8 | 58.5 | 60.3 |
| Saint Lucia | 87.3 | 89.3 | 92.5 | 93.2 | 93.8 | 94.5 | 95.1 | 95.1 |
| Hungary | 90.6 | 93.2 | 95.7 | 96.2 | 96.7 | 97.2 | 97.7 | 97.7 |
| Ireland | 96.1 | 97.2 | 98.3 | 98.5 | 98.7 | 98.9 | 99.1 | 99.1 |
| United States of America | 94.6 | 94.6 | 94.6 | 94.6 | 94.6 | 94.6 | 94.6 | |
| Fiji | 73.9 | 74.1 | 74.1 | 74.2 | 74.2 | 74.2 | 74.3 | |
| Lesotho | 56.7 | 56.7 | 56.7 | 56.7 | 56.7 | 56.7 | 56.7 | 56.7 |
| Belgium | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Australia | 59.1 | 64.8 | 74.4 | 76.3 | 78.2 | 80.1 | 82.0 | 83.9 |
| India | 30.9 | 30.9 | 31.0 | 31.0 | 31.0 | 31.0 | 31.0 | 31.1 |
| Bolivia (Plurinational State of) | 44.8 | 43.0 | 41.2 | 40.9 | 40.5 | 40.2 | 39.8 | 39.4 |
| Spain | 99.6 | 99.8 | 99.9 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Costa Rica | 80.3 | 86.6 | 92.8 | 94.1 | 95.4 | 96.6 | 97.9 | 99.1 |
| Sweden | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Iran (Islamic Republic of) | 82.7 | 83.0 | 84.8 | 85.1 | 85.5 | 85.8 | 86.2 | 86.6 |
| Mongolia | 3.2 | 3.5 | 3.8 | 3.9 | 4.0 | 4.0 | 4.1 | 4.2 |
| United Kingdom | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Luxembourg | 99.0 | 99.0 | 99.0 | 99.0 | 99.0 | 99.0 | ||
| Marshall Islands | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Mauritius | 98.9 | 99.2 | 99.6 | 99.7 | 99.7 | 99.8 | 99.8 | 99.8 |
| Pakistan | 18.7 | 18.7 | 18.8 | 18.8 | 18.8 | 18.8 | 18.8 | 18.8 |
| Jordan | 85.9 | 83.8 | 81.7 | 81.3 | 80.9 | 80.5 | 80.1 | 79.7 |
| Slovenia | 99.4 | 99.2 | 98.9 | 98.9 | 98.8 | 98.7 | 98.7 | 98.7 |
| Oman | 62.8 | 67.8 | 68.8 | 69.8 | 70.8 | 71.8 | 72.7 | |
| Angola | 13.6 | 12.1 | 10.6 | 10.3 | 10.0 | 9.7 | 9.4 | 9.1 |
| Finland | 93.6 | 95.0 | 98.6 | 99.3 | 100.0 | 100.0 | 100.0 | 100.0 |
| Congo | 9.7 | 9.3 | 8.9 | 8.8 | 8.7 | 8.6 | 8.5 | 8.5 |
| United Republic of Tanzania | 24.5 | 24.2 | 24.0 | 23.9 | 23.9 | 23.8 | 23.8 | 23.8 |
| Estonia | 66.0 | 74.2 | 82.4 | 84.1 | 85.7 | 87.4 | 89.0 | 89.0 |
| Malaysia | 87.8 | 85.4 | 82.4 | 81.8 | 81.2 | 80.5 | 79.9 | 79.3 |
| Kenya | 17.7 | 19.1 | 20.6 | 20.9 | 21.2 | 21.5 | 21.8 | 22.0 |
| Madagascar | 11.5 | 12.8 | 14.1 | 14.3 | 14.6 | 14.9 | 15.1 | 15.4 |
| New Zealand | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Palau | 80.3 | 85.8 | 91.2 | 92.3 | 93.4 | 94.5 | 95.6 | 96.7 |
| Latvia | 56.5 | 63.6 | 72.5 | 74.3 | 76.1 | 77.9 | 79.6 | 81.4 |
| Democratic People's Republic of Korea | 70.9 | 77.0 | 83.1 | 84.4 | 84.4 | 84.4 | 84.4 | 84.4 |
| Central African Republic | 4.3 | 3.0 | 1.7 | 1.4 | 1.2 | 1.2 | 1.2 | 1.2 |
| Nepal | 42.7 | 43.4 | 44.2 | 44.3 | 44.5 | 44.6 | 44.8 | 44.9 |
| Panama | 75.3 | 77.1 | 78.9 | 79.3 | 79.7 | 80.0 | 80.4 | 80.8 |
| Ghana | 15.7 | 17.0 | 18.3 | 18.5 | 18.8 | 19.0 | 19.3 | 19.5 |
| Kyrgyzstan | 21.3 | 39.5 | 62.3 | 66.8 | 71.4 | 75.9 | 80.5 | 83.8 |
| France | 99.1 | 99.5 | 99.9 | 99.9 | 100.0 | 100.0 | 100.0 | 100.0 |
| Uruguay | 58.4 | 61.7 | 77.8 | 81.1 | 84.3 | 87.6 | 90.8 | 94.0 |
| Sri Lanka | 14.8 | 19.9 | 25.0 | 26.0 | 27.0 | 28.1 | 29.1 | 29.1 |
| Thailand | 14.8 | 26.3 | 37.7 | 40.0 | 42.3 | 44.6 | 46.9 | 49.2 |
| Belarus | 53.1 | 55.3 | 60.7 | 61.8 | 62.8 | 63.9 | 65.0 | 66.1 |
| Cyprus | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Kiribati | 20.5 | 13.4 | 6.3 | 4.9 | 3.4 | 3.4 | 3.4 | 3.4 |
| Eritrea | 13.7 | 25.0 | 36.3 | 38.6 | 40.8 | 40.8 | 40.8 | 40.8 |
| Chile | 62.4 | 75.1 | 87.8 | 90.4 | 92.9 | 95.5 | 98.0 | 100.0 |
| Andorra | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Myanmar | 7.2 | 7.8 | 8.3 | 8.4 | 8.5 | 8.6 | 8.7 | 8.8 |
| Cuba | 48.0 | 51.0 | 54.0 | 54.6 | 55.2 | 55.8 | 56.4 | 57.0 |
| Mali | 8.0 | 10.8 | 13.6 | 14.2 | 14.8 | 15.3 | 15.9 | 16.4 |
| Cameroon | 12.3 | 12.5 | 12.8 | 12.9 | 12.9 | 13.0 | 13.0 | 13.1 |
| Somalia | 4.1 | 5.6 | 7.0 | 7.3 | 7.6 | 7.9 | 8.2 | 8.5 |
| Gabon | 22.9 | 23.3 | 23.8 | 23.9 | 24.0 | 24.1 | 24.1 | 24.2 |
| Serbia | 61.0 | 63.9 | 77.9 | 80.7 | 83.5 | 86.3 | 89.1 | 91.9 |
| Paraguay | 19.4 | 40.0 | 60.7 | 64.8 | 68.9 | 73.1 | 77.2 | 81.3 |
| Brunei Darussalam | 99.0 | 99.0 | 99.0 | 99.0 | 99.0 | 99.0 | ||
| Georgia | 41.6 | 52.4 | 63.3 | 65.4 | 67.6 | 69.8 | 72.0 | 74.1 |
| Suriname | 49.1 | 48.3 | 47.5 | 47.3 | 47.2 | 47.2 | 47.2 | 47.2 |
| Tajikistan | 33.3 | 39.1 | 45.0 | 46.2 | 47.3 | 48.5 | 49.7 | 49.7 |
| Solomon Islands | 56.9 | 55.4 | 47.8 | 46.2 | 44.7 | 43.2 | 41.7 | 40.1 |
| Guinea | 0.0 | 2.0 | 4.3 | 4.7 | 5.2 | 5.6 | 6.1 | 6.5 |
| Viet Nam | 1.5 | 7.7 | 13.9 | 15.1 | 16.4 | 17.6 | 18.8 | 20.1 |
| Italy | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Haiti | 31.0 | 28.4 | 25.8 | 25.3 | 24.8 | 24.3 | 23.8 | 23.8 |
| Tunisia | 57.7 | 61.1 | 64.5 | 65.2 | 65.9 | 66.6 | 67.3 | 68.0 |
| Rwanda | 32.0 | 30.4 | 28.8 | 28.5 | 28.1 | 27.8 | 27.5 | 27.2 |
| Djibouti | 29.5 | 27.7 | 25.9 | 25.6 | 25.2 | 24.9 | 24.5 | 24.5 |
| Guyana | 63.5 | 61.7 | 59.8 | 59.5 | 59.1 | 58.7 | 58.4 | 58.0 |
| Azerbaijan | 22.3 | 34.1 | 46.0 | 48.3 | 50.7 | 53.0 | 55.4 | 57.8 |
| Democratic Republic of the Congo | 3.4 | 4.9 | 6.4 | 6.7 | 7.0 | 7.3 | 7.6 | 7.9 |
| Belize | 52.1 | 59.6 | 67.2 | 68.7 | 70.2 | 71.7 | 73.2 | 74.7 |
| Lithuania | 54.3 | 65.4 | 76.4 | 78.6 | 80.8 | 83.0 | 85.2 | 85.2 |
| Uzbekistan | 62.3 | 58.6 | 56.3 | 56.3 | 56.3 | |||
| Mexico | 62.0 | 69.7 | 77.5 | 79.0 | 80.6 | 82.1 | 83.7 | 85.2 |
| Swaziland | 34.8 | 39.0 | 43.2 | 44.1 | 44.9 | 45.7 | 46.6 | 47.4 |
| Algeria | 67.0 | 65.8 | 64.7 | 64.5 | 64.3 | 64.1 | 63.8 | 63.6 |
| Ethiopia | 5.7 | 10.4 | 15.1 | 16.1 | 17.0 | 17.9 | 18.9 | 19.8 |
| Zambia | 6.6 | 5.7 | 4.8 | 4.6 | 4.4 | 4.2 | 4.0 | 3.9 |
| Norway | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Sierra Leone | 6.3 | 9.4 | 13.3 | 14.0 | 14.8 | 15.6 | 16.3 | 17.1 |
| The former Yugoslav Republic of Macedonia | 84.6 | 84.6 | 84.6 | 84.6 | 84.6 | 84.6 | 84.6 | 84.6 |
| Nicaragua | 38.2 | 36.5 | 34.8 | 34.4 | 34.1 | 33.7 | 33.4 | 33.0 |
| Ecuador | 55.7 | 59.4 | 63.2 | 64.0 | 64.7 | 65.5 | 66.2 | 67.0 |
| Cabo Verde | 60.4 | 65.4 | 70.5 | 71.5 | 72.5 | 73.5 | 74.6 | 75.6 |
| Poland | 92.0 | 92.9 | 93.9 | 94.1 | 94.3 | 94.5 | 94.6 | 94.6 |
| Czech Republic | 91.4 | 94.4 | 98.3 | 99.0 | 99.8 | 99.8 | 99.8 | 99.8 |
| Guatemala | 64.9 | 64.4 | 64.0 | 63.9 | 63.8 | 63.7 | 63.6 | 63.5 |
| Germany | 98.9 | 99.7 | 99.8 | 100.0 | 100.0 | 100.0 | 100.0 | |
| Russian Federation | 44.4 | 56.7 | 69.1 | 71.6 | 74.0 | 76.5 | 79.0 | 81.5 |
| Timor-Leste | 33.0 | 31.5 | 31.2 | 30.9 | 30.6 | 30.3 | 30.0 | |
| Benin | 25.4 | 26.9 | 28.5 | 28.8 | 29.1 | 29.4 | 29.7 | 30.0 |
| China | 26.0 | 38.0 | 50.0 | 52.4 | 54.8 | 57.3 | 59.7 | 62.1 |
| Togo | 19.7 | 16.0 | 12.3 | 11.6 | 10.8 | 10.1 | 9.4 | 8.6 |
| Jamaica | 61.0 | 62.9 | 64.7 | 65.1 | 65.5 | 65.9 | 66.3 | 66.3 |
| Cambodia | 1.3 | 3.6 | 6.0 | 6.4 | 6.9 | 7.4 | 7.8 | 8.3 |
| Armenia | 71.3 | 79.5 | 87.8 | 89.4 | 91.1 | 92.7 | 94.3 | 96.0 |
| Republic of Moldova | 0.5 | 13.5 | 26.5 | 29.1 | 31.7 | 34.3 | 36.9 | 36.9 |
| Gambia | 26.7 | 35.6 | 44.5 | 46.2 | 48.0 | 49.8 | 51.6 | 53.4 |
| Kazakhstan | 31.5 | 39.3 | 47.1 | 48.7 | 50.2 | 51.8 | 53.4 | 54.9 |
| Uganda | 2.3 | 5.3 | 8.3 | 8.9 | 9.6 | 10.2 | 10.8 | 11.4 |
| Botswana | 77.1 | 76.9 | 76.8 | 76.8 | 76.8 | 76.8 | 76.8 | 76.8 |
| Sudan | 17.9 | 19.2 | 25.9 | 27.2 | 28.5 | 29.8 | 31.2 | 32.5 |
| Equatorial Guinea | 2.9 | 10.4 | 17.8 | 19.3 | 20.8 | 22.3 | 22.3 | 22.3 |
| Syrian Arab Republic | 62.9 | 70.1 | 77.2 | 78.6 | 80.0 | 80.0 | 80.0 | 80.0 |
| Niger | 10.7 | 13.2 | 15.6 | 16.1 | 16.6 | 17.1 | 17.5 | 18.0 |
| Tuvalu | 96.1 | 97.8 | 98.2 | 98.5 | 98.6 | 98.8 | 98.8 | |
| Afghanistan | 2.1 | 3.1 | 4.3 | 4.6 | 4.8 | 5.1 | 5.3 | 5.5 |
| Turkmenistan | 29.4 | 30.4 | 31.5 | 31.7 | 31.9 | 32.1 | 32.3 | 32.6 |