Last updated: 28 Aug 2015 |
| Country | 1990 | 1991 | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 |
| Afghanistan | | | | | | | | | | | | | | | | | | | | | | 47.0 | | |
| Albania | | | | | | | | | | | | 99.4 | | | | | | | 98.8 | | | 98.8 | | |
| Algeria | | | | | | | | | | | | | 90.1 | | | | 91.8 | | | | | | | |
| Angola | | | | | | | | | | | | 72.2 | | | | | | | | | | | 73.0 | |
| Argentina | | 98.3 | | | | | | | | | | 98.9 | | | | | | | | | | | 99.2 | |
| Armenia | | | | | | | | | | | | 99.8 | | | | | | | | | | | | |
| Aruba | | | | | | | | | | | 99.0 | | | | | | | | | | 99.1 | | | |
| Azerbaijan | | | | | | | | | | 99.9 | | | | | | | | 100.0 | | 100.0 | 100.0 | 99.9 | 99.9 | |
| Bahrain | | 96.9 | | | | | | | | | | 97.0 | | | | | | | | | 98.2 | | | |
| Bangladesh | | 44.7 | | | | | | | | | | 63.6 | | | | | | | | | | | 79.9 | |
| Belarus | | | | | | | | | | 99.8 | | | | | | | | | | 99.8 | | | | |
| Belize | | 76.4 | | | | | | | | | | | | | | | | | | | | | | |
| Benin | | | 39.9 | | | | | | | | | | 45.3 | | | | 42.4 | | | | | | | |
| Bhutan | | | | | | | | | | | | | | | | 74.4 | | | | | | | | |
| Bolivia | | | 93.9 | | | | | | | | | 97.3 | | | | | | 99.4 | 99.1 | 99.4 | | 99.0 | 99.0 | |
| Bosnia and Herzegovina | | | | | | | | | | | 99.8 | | | | | | | | | | | | 99.7 | |
| Botswana | | 89.3 | | | | | | | | | | | | 94.0 | | | | | | | | | 96.0 | |
| Brazil | | | | | | | | | | | 94.2 | | | | 96.8 | | 97.6 | 97.8 | 97.8 | 98.1 | 97.5 | 98.5 | 98.6 | |
| Brunei Darussalam | | 98.1 | | | | | | | | | | 98.9 | | | | | | | | | | | 99.8 | |
| Bulgaria | | | | | | | | | | | | 98.2 | | | | | | | | | | 97.9 | | |
| Burkina Faso | | 20.2 | | | | | 19.4 | | | | | | | 31.2 | | 33.0 | 32.7 | 39.3 | | | | | | |
| Burundi | 53.6 | | | | | | | | | | 73.3 | | | | | | | | 88.9 | | | | | |
| Cambodia | | | | | | | | | 76.3 | | | | | | 83.4 | | | | 87.5 | 87.1 | | | | |
| Cameroon | | | | | | | | | | | 83.1 | | | | | | | 83.1 | | | 80.6 | | | |
| Cape Verde | 88.2 | | | | | | | | | | | | | | 97.1 | | | | | | | | 98.1 | |
| Cayman Islands | | | | | | | | | | | | | | | | | | 98.9 | | | | | | |
| Central African Republic | | | | | | | | | | | 60.8 | | | | | | | | | | 36.4 | | | |
| Chad | | | | 17.3 | | | | | | | 37.6 | | | | 41.7 | | | | | | | | 48.9 | |
| Chile | | | 98.4 | | | | | | | | | | 99.0 | | | | | | 99.2 | 98.9 | | | | |
| China | 94.3 | | | | | | | | | | 98.9 | | | | | | | | | | 99.6 | | | |
| China, Macao Special Administrative Region | | | | | | | | | | | | 99.6 | | | | | 99.6 | | | | | | | |
| Colombia | | | | 90.5 | | | 97.0 | | | | | | | | 98.0 | 98.0 | 97.9 | 98.0 | 98.0 | 97.9 | 98.1 | 98.2 | | |
| Comoros | | | | | | | | | | | 80.2 | | | | | | | | | | | | 86.4 | |
| Congo | | | | | | | | | | | | | | | | | | | | | | 80.9 | | |
| Costa Rica | | | | | | | | | | | 97.6 | | | | | | | | | | | 99.1 | | |
| Cote d'Ivoire | | | | | | | | | 47.1 | | 60.7 | | | | | | | | | | | | 48.3 | |
| Croatia | | 99.6 | | | | | | | | | | 99.6 | | | | | | | | | | 99.7 | | |
| Cuba | | | | | | | | | | | | | 100.0 | | | | | | | | | | 100.0 | |
| Cyprus | | | 99.6 | | | | | | | | | 99.8 | | | | | | | | | | 99.8 | | |
| Democratic Republic of the Congo | | | | | | | | | | | | 70.4 | | | | | | 65.8 | | | | | | |
| Dominican Republic | | | | | | | | | | | | | 94.2 | | | | | 95.8 | | | 96.8 | 97.0 | 97.0 | 97.5 |
| Ecuador | 96.2 | | | | | | | | | | | 96.4 | | | | | | 95.4 | | 96.8 | 98.7 | 98.7 | 98.8 | 98.6 |
| Egypt | | | | | | | 73.2 | | | | | | | | | 84.9 | 84.9 | | | | 87.5 | | 89.3 | |
| El Salvador | | | 84.9 | | | | | | | | | | | | 92.2 | | 95.0 | 93.6 | 96.0 | 95.0 | 96.0 | 96.5 | | |
| Equatorial Guinea | | | | | | | | | | | 97.1 | | | | | | | | | | | | 98.1 | |
| Eritrea | | | | | | | | | | | | | 77.9 | | | | | | | | | | 91.0 | |
| Estonia | | | | | | | | | | | 99.8 | | | | | | | | | | | 99.9 | | |
| Ethiopia | | | | | 33.6 | | | | | | | | | | 49.9 | 44.6 | | 55.0 | | | | | | |
| Gabon | | | | 93.2 | | | | | | | | | | | 90.9 | | | | | | | | 88.5 | |
| Gambia | | | | | | | | | | | 52.6 | | | | | | | | | | | | 69.4 | |
| Georgia | | | | | | | | | | | | | 99.8 | | | | | | | | | | 99.8 | |
| Ghana | | | | | | | | | | | 70.7 | | | | | | | | | | 85.7 | | | |
| Greece | | 99.0 | | | | | | | | | | 98.9 | | | | | | | | | | | 99.4 | |
| Guadeloupe | | | | | 99.6 | | | | | | | | | | 99.9 | | | | | | | | 99.9 | |
| Guatemala | | | | | 76.0 | | | | | | | | 82.2 | | | | | | | | | | 93.7 | |
| Guinea | | | | | | | 27.7 | | | | | | | 47.1 | | | | | | | 31.4 | | | |
| Guinea-Bissau | | | | | | | | | | | 59.5 | | | | | | | | | | | | 74.3 | |
| Guyana | | | | | | | | | | | | | | | | | | | | 93.1 | | | | |
| Haiti | | | | | | | | | | | | | | 81.6 | | | 72.3 | | | | | | | |
| Honduras | | | | | | | | | | | | 88.9 | | | | | | 93.9 | | | 95.2 | 95.9 | 95.0 | |
| Hungary | | | | | 99.1 | | | | | | | | | | 99.0 | | | | | | | | 99.4 | |
| India | | 61.9 | | | | | | | | | | 76.4 | | | | | 81.1 | | | | | | | |
| Indonesia | 96.2 | | | | | | | | | | | | | | 98.7 | | 96.7 | | 99.5 | 99.5 | | 98.8 | | |
| Iran (Islamic Republic of) | | 87.0 | | | | | 93.0 | | | | | | 93.0 | | | 97.4 | 96.6 | | 98.7 | | | | 98.0 | |
| Iraq | | | | | | | | | | | 84.8 | | | | | | | | | | | | 82.2 | |
| Israel | | | | | | | | | | | | | | | | | | | | | | 99.5 | | |
| Italy | | | | | | | | | | | | 99.8 | | | | | | | | | | | 99.9 | |
| Jamaica | | | | | | | | | | 91.6 | | | | | | | | | | | | | 95.9 | |
| Jordan | | | | | | | | | | | | | | 99.1 | | 99.0 | | 98.9 | | | 98.8 | 99.1 | 99.1 | |
| Kazakhstan | | | | | | | | | | 99.8 | | | | | | | | | | 99.8 | | | | |
| Kenya | | | | | | | | | | | 92.5 | | | | | | | 82.4 | | | | | | |
| Korea, Democratic People's Republic of | | | | | | | | | | | | | | | | | | | 100.0 | | | | | |
| Kuwait | | | | | | 92.0 | | | | | | | | | | 99.7 | 98.5 | 98.4 | 98.6 | | | | 98.8 | |
| Kyrgyzstan | | | | | | | | | | 99.7 | | | | | | | | | | 99.8 | | | | |
| Lao People's Democratic Republic | | | | | | 71.1 | | | | | 80.6 | 78.5 | | | | 83.9 | | | | | | | | |
| Latvia | | | | | | | | | | | 99.8 | | | | | | | | | | | 99.8 | | |
| Lebanon | | | | | | | | | | | | | | | | | | 98.7 | | | | | | |
| Lesotho | | | | | | | | | | | 90.9 | | | | | | | | | 83.2 | | | | |
| Liberia | | | | | 60.0 | | | | | | | | | | 49.2 | | | 49.1 | | | | | | |
| Libyan Arab Jamahiriya | | | | | 89.3 | | | | | | | | | | 99.6 | | | | | | | | 99.9 | |
| Lithuania | | | | | | | | | | | | 99.7 | | | | | | | | | | 99.9 | | |
| Madagascar | | | | | | | | | | | 70.2 | | | | | | | | | 64.9 | | | | |
| Malawi | | | | | | | | | 76.0 | | | | | | | | | | | | 72.1 | | | |
| Malaysia | | 95.6 | | | | | | | | | 97.2 | | | | | | | | | | 98.4 | | | |
| Maldives | | | | | | 98.2 | | | | | 98.2 | | | | | | 99.3 | | | | | | | |
| Mali | | | | | | | | | 24.2 | | | | | 30.5 | | | 38.8 | | | | 44.3 | 47.1 | | |
| Malta | | | | | | 96.0 | | | | | | | | | | 98.3 | | | | | | | | |
| Martinique | | | | | 99.5 | | | | | | | | | | 99.5 | | | | | | | | 99.9 | |
| Mauritania | | | | | | | | | | | 61.3 | | | | | | | 56.1 | | | | | | |
| Mauritius | 91.2 | | | | | | | | | | 94.5 | | | | | | | | | | | 98.1 | | |
| Mexico | 95.4 | | | | | | | | | | 96.6 | | 97.6 | | 97.6 | 97.6 | 97.9 | 98.2 | 98.4 | 98.5 | 98.4 | 98.5 | 98.9 | |
| Mongolia | | | | | | | | | | | 97.7 | | | | | | | | | | 98.5 | | | |
| Montenegro | | | | | | | | | | | | | | | | | | | | | | 99.2 | | |
| Morocco | | | | | 58.4 | | | | | | | | | | 70.5 | | | | 77.9 | 79.5 | | 81.5 | | |
| Mozambique | | | | | | | | 47.0 | | | | | | 61.9 | | | | | | 67.1 | | | | |
| Myanmar | | | | | | | | | | | 94.6 | | | | | | | | | | | | 96.0 | |
| Namibia | | 88.1 | | | | | | | | | | 92.3 | | | | | | 87.1 | | | | | | |
| Nepal | | 49.6 | | | | | | | | | | 70.1 | | | | | | | | | | 82.4 | | |
| Netherlands Antilles | | | 97.0 | | | | | | | | | | | | | | | | | | | | | |
| New Caledonia | | | | | | | 99.1 | | | | | | | | | | | | | | | | 99.6 | |
| Nicaragua | | | | | | | | | | | | 86.2 | | | | 87.0 | | | | | | | | |
| Niger | | | | | | | | | | | | 19.8 | | | | 36.5 | | | | | | | 23.5 | |
| Nigeria | | 71.2 | | | | | | | | | | | | 69.0 | | | | | 66.4 | | | | | |
| Oman | | | | | | | | | | | | | | 97.3 | | | | | 97.6 | | 97.7 | | | |
| Pakistan | | | | | | | | | 55.3 | | | | | | | 65.1 | 69.2 | | 71.1 | 70.7 | 71.3 | 70.8 | | |
| Palau | | | | | | | | | | | | | | | | | | | | | | | | 99.8 |
| Panama | 95.1 | | | | | | | | | | 96.1 | | | | | | | | | | 97.6 | | | |
| Papua New Guinea | | | | | | | | | | | 66.7 | | | | | | | | | | | | 71.2 | |
| Paraguay | | | 95.6 | | | | | | | | | | | | | | | 98.8 | 98.0 | 98.5 | 98.6 | | | |
| Peru | | | | 95.4 | | | | | | | | | | | 96.8 | 97.1 | 97.8 | 97.4 | | | | | 98.7 | |
| Philippines | 96.6 | | | | | | | | | | 95.1 | | | 95.1 | | | | | 97.8 | | | | | |
| Poland | | | | | 100.0 | | | | | | | | | | 100.0 | | | | | | | | 100.0 | |
| Portugal | | 99.2 | | | | | | | | | | | | | | | | | | | | 99.4 | | |
| Puerto Rico | 93.2 | | | | | | | | | | | | | | 88.7 | | | | | | 98.8 | | | |
| Qatar | | | | | | | | 94.8 | | | | | | | 95.9 | | | 99.1 | 95.7 | 97.8 | 96.8 | 97.9 | 99.1 | |
| Republic of Moldova | | | | | | | | | | | 99.5 | | | | | | | | | | | | 100.0 | |
| Reunion | | | | | 98.7 | | | | | | | | | | 98.7 | | | | | | | | 99.8 | |
| Romania | | | 99.1 | | | | | | | | | | 97.8 | | | | | | | | | 99.0 | | |
| Russian Federation | | | | | | | | | | | | | 99.7 | | | | | | | | 99.7 | | | |
| Rwanda | | 74.9 | | | | | | | | | 77.6 | | | | | | | | | | 77.3 | | | |
| Samoa | | 99.0 | | | | | | | | | | | | | 99.4 | | | | | | | | 99.5 | |
| Sao Tome and Principe | | 93.8 | | | | | | | | | | 95.4 | | | | | | | 80.2 | | | | | |
| Saudi Arabia | | | 87.9 | | | | | | | | 95.9 | | | | 95.8 | | | | | | | | | 99.2 |
| Senegal | | | | | | | | | | | | | 49.1 | | | | 50.9 | | | 65.0 | | 66.0 | | |
| Serbia | | | | | | | | | | | | | | | | | | | | | | | 99.3 | |
| Seychelles | | | | | 98.8 | | | | | | | | 99.1 | | | | | | | | | | 99.1 | |
| Sierra Leone | | | | | | | | | | | | | | | 47.9 | | | | | | | | 62.7 | |
| Singapore | 99.0 | | | | | | | | | | 99.5 | | | | | | | | | | 99.8 | 99.8 | 99.8 | |
| Slovenia | | 99.8 | | | | | | | | | | | | | 99.8 | | | | | | | | 99.9 | |
| Solomon Islands | | | | | | | | | | 85.0 | | | | | | | | | | | | | | |
| South Africa | | | | | | | 93.9 | | | | | | | | | | | 97.6 | | 98.4 | 98.6 | 98.8 | 98.9 | |
| Spain | | 99.6 | | | | | | | | | | | | | | 99.5 | | 99.6 | 99.6 | 99.6 | 99.6 | 99.7 | 99.7 | |
| Sri Lanka | | | | | | | | | | | | 95.6 | | | | | 97.5 | | 98.0 | | 98.2 | | | |
| State of Palestine | | | | | | | | 97.0 | | | | | | | 98.9 | | 99.1 | 99.1 | 99.2 | 99.2 | 99.2 | 99.3 | 99.3 | |
| Sudan | | | | | | | | | | | 78.2 | | | | | | | | | | | | 87.9 | |
| Sudan (former) | | | | | | | | | | | 78.2 | | | | | | | | | | | | | |
| Suriname | | | | | | | | | | | | | | | 94.9 | | | | 99.4 | | 98.4 | | | |
| Swaziland | | | | | | | | | | | 91.9 | | | | | | | | | | 93.5 | | | |
| Syrian Arab Republic | | | | | | | | | | | | | 95.2 | | 92.5 | | | | | | | | 95.6 | |
| Tajikistan | | | | | | | | | | | 99.8 | | | | | | | | | | | | 99.9 | |
| Thailand | | | | | | | | | | | 98.0 | | | | | 98.1 | | | | | 96.6 | | | |
| The former Yugoslav Republic of Macedonia | | | | | 98.9 | | | | | | | | 98.7 | | | | | | | | | | 98.6 | |
| Timor-Leste | | | | | | | | | | | | | | | | | | | | | 79.5 | | | |
| Togo | | | | | | | | | | | 74.4 | | | | | | 76.5 | | | 81.7 | | 79.9 | | |
| Tonga | | | | | | | 99.3 | | | | | | | | | | 99.4 | | | | | 99.4 | | |
| Trinidad and Tobago | 99.3 | | | | | | | | | | | | | | 99.5 | | | | | | | | 99.6 | |
| Tunisia | | | | | 82.8 | | | | | | | | | | 94.3 | | | 96.3 | 96.8 | | 97.2 | 97.3 | | |
| Turkey | 92.5 | | | | | | | | | | | | | | 95.6 | 96.1 | 96.2 | 96.4 | | 97.8 | 98.2 | 98.7 | 99.0 | |
| Turkmenistan | | | | | | 99.8 | | | | | | | | | | | | | | | | | 99.8 | |
| Uganda | | 69.8 | | | | | | | | | | | 80.8 | | | | 84.1 | | | | 87.4 | | | |
| Ukraine | | | | | | | | | | | | 99.8 | | | | | | | | | | | 99.8 | |
| United Arab Emirates | | | | | | | | | | | | | | | | 95.0 | | | | | | | | |
| United Republic of Tanzania | | | | | | | | | | | | | 78.4 | | | | | | | | 74.6 | | | |
| Uruguay | | | | | | | 98.6 | | | | | | | | | | 98.7 | 98.8 | 99.0 | 99.0 | 98.8 | 98.9 | 99.0 | |
| Uzbekistan | | | | | | | | | | | 99.9 | | | | | | | | | | | | 99.9 | |
| Vanuatu | | | | | 86.3 | | | | | | | | | | 92.0 | | | | | | | | 94.9 | |
| Venezuela | 95.4 | | | | | | | | | | | 97.2 | | | | | | 98.4 | | 98.5 | | | | |
| Viet Nam | | | | | | | | | | 93.9 | 94.8 | | | | | | | | | 97.1 | | | | |
| Yemen | | | | | 60.2 | | | | | | | | | | 76.9 | | | | | | | | 87.4 | |
| Zambia | 66.4 | | | | | | | | | 69.5 | | | 69.1 | | | | | 64.0 | | | | | | |
| Zimbabwe | | | 95.4 | | | | | | | | | | | | | | | | | | | 90.9 | | |