| Afghanistan | | .. | .. | .. | .. | .. | .. | .. |
| Åland Islands | | .. | .. | .. | .. | .. | .. | .. |
| Albania | | 18.20 | 18.25 | 18.35 | 17.70 | 17.48 | 17.09 | .. |
| Algeria | | .. | .. | .. | .. | .. | .. | .. |
| American Samoa | | .. | .. | .. | .. | .. | .. | .. |
| Andorra | | 14.09 | 13.70 | 13.41 | 13.68 | 13.88 | 13.28 | .. |
| Angola | | .. | .. | .. | 63.05 | .. | .. | .. |
| Anguilla | | .. | .. | .. | .. | .. | .. | .. |
| Antigua and Barbuda | | .. | .. | .. | .. | .. | .. | .. |
| Argentina | | .. | .. | .. | .. | .. | .. | .. |
| Armenia | | 8.61 | 8.99 | 8.73 | 8.55 | 8.39 | 6.27 | .. |
| Aruba | | .. | .. | .. | .. | .. | .. | .. |
| Australia | | .. | .. | .. | .. | .. | .. | .. |
| Austria | | 11.68 | 11.74 | 11.41 | 11.15 | 11.54 | .. | .. |
| Azerbaijan | | 9.95 | 10.93 | 11.48 | 10.77 | .. | 18.17 | .. |
| Bahamas | | 13.97 | 21.17 | 15.95 | 22.67 | 18.16 | 20.66 | .. |
| Bahrain | | 14.62 | 15.22 | 14.99 | 14.32 | 13.77 | 14.40 | .. |
| Bangladesh | | .. | .. | .. | .. | .. | .. | .. |
| Barbados | | .. | 16.08 | 16.39 | 15.65 | 16.20 | 15.65 | .. |
| Belarus | | 7.64 | 7.81 | 7.64 | 7.64 | 7.76 | 7.92 | .. |
| Belgium | | 13.58 | 13.43 | 13.08 | 12.90 | 12.70 | .. | .. |
| Belize | | 16.97 | 16.60 | 16.49 | 16.89 | 16.40 | 16.44 | .. |
| Benin | | 26.15 | 26.71 | 25.60 | 26.16 | .. | 23.97 | .. |
| Bermuda | | 6.48 | 8.59 | .. | .. | .. | .. | .. |
| Bhutan | | 11.62 | 11.26 | 11.56 | 12.41 | 10.79 | 11.12 | .. |
| Bolivia (Plurinational State of) | | 31.69 | 32.80 | 32.98 | 32.77 | 31.75 | 31.01 | .. |
| Bosnia and Herzegovina | | .. | .. | .. | .. | 14.47 | 13.86 | .. |
| Botswana | | | 19.35 | .. | .. | .. | .. | .. |
| Brazil | | 17.10 | 17.00 | 16.79 | 16.60 | 16.48 | .. | .. |
| British Virgin Islands | | .. | .. | 10.09 | 8.27 | .. | .. | .. |
| Brunei Darussalam | | 13.44 | 17.02 | 17.07 | 15.38 | 16.22 | 15.43 | .. |
| Bulgaria | | 12.70 | 12.82 | .. | 12.30 | 12.23 | .. | .. |
| Burkina Faso | | 24.67 | .. | 22.30 | 17.29 | 17.58 | 17.21 | .. |
| Burundi | | 33.85 | 35.27 | 33.98 | 35.17 | 32.07 | 38.19 | .. |
| Cambodia | | 28.59 | 31.35 | 30.81 | 32.10 | 34.42 | 33.34 | .. |
| Cameroon | | .. | 21.10 | 20.54 | 20.81 | 20.63 | 20.26 | .. |
| Canada | | .. | .. | .. | .. | .. | .. | .. |
| Cabo Verde | | 18.19 | 17.70 | 18.89 | 18.42 | 18.07 | 16.33 | .. |
| Cayman Islands | | .. | .. | .. | .. | .. | .. | .. |
| Central African Republic | | .. | .. | .. | .. | .. | .. | .. |
| Chad | | .. | .. | 29.04 | 31.93 | .. | .. | .. |
| Channel Islands | | .. | .. | .. | .. | .. | .. | .. |
| Chile | | 28.19 | 27.53 | 26.83 | 26.32 | 25.40 | .. | .. |
| China | | 22.27 | 21.04 | 19.93 | 19.08 | 18.06 | 17.38 | .. |
| China, Hong Kong Special Administrative Region | | .. | .. | .. | .. | .. | .. | .. |
| China, Macao Special Administrative Region | | 16.56 | 16.04 | 15.89 | 16.17 | 14.65 | 14.50 | .. |
| Colombia | | .. | .. | .. | .. | .. | .. | .. |
| Comoros | | .. | .. | .. | .. | 20.33 | 28.42 | .. |
| Congo | | .. | .. | .. | .. | .. | .. | .. |
| Cook Islands | | 15.55 | 13.94 | 16.58 | 16.50 | .. | .. | .. |
| Costa Rica | | 12.81 | 13.10 | 12.83 | 11.93 | 11.74 | 12.91 | .. |
| Côte d'Ivoire | | 20.71 | 21.85 | 22.09 | 22.95 | 22.92 | 21.10 | .. |
| Croatia | | 13.25 | 13.11 | 13.23 | 12.94 | .. | .. | .. |
| Cuba | | .. | .. | .. | .. | .. | .. | .. |
| Curaçao | | .. | .. | .. | .. | .. | .. | .. |
| Cyprus | | 16.17 | 15.63 | 12.59 | 15.08 | 14.40 | .. | .. |
| Czechia | | 13.89 | .. | .. | .. | .. | .. | .. |
| Democratic People's Republic of Korea | | .. | .. | .. | .. | .. | .. | .. |
| Democratic Republic of the Congo | | 25.71 | 24.57 | 23.29 | .. | .. | .. | .. |
| Denmark | | .. | .. | .. | .. | .. | .. | .. |
| Djibouti | | .. | .. | .. | 29.49 | 16.40 | 14.40 | .. |
| Dominica | | 12.54 | 12.89 | 11.35 | 11.27 | .. | .. | .. |
| Dominican Republic | | 23.39 | 21.41 | 17.94 | 18.91 | 19.47 | 18.89 | .. |
| Ecuador | | 21.81 | 22.44 | 21.73 | 21.40 | 20.38 | 19.32 | .. |
| Egypt | | .. | .. | .. | 26.94 | 26.30 | 26.04 | .. |
| El Salvador | | .. | .. | 31.92 | 32.37 | 27.30 | 28.21 | .. |
| Equatorial Guinea | | .. | .. | 16.65 | .. | .. | .. | .. |
| Eritrea | | 33.83 | | 28.93 | .. | 29.14 | 29.35 | .. |
| Estonia | | .. | .. | .. | .. | .. | .. | .. |
| Eswatini | | .. | .. | .. | .. | .. | .. | .. |
| Ethiopia | | .. | .. | .. | .. | .. | .. | .. |
| Faeroe Islands | | .. | .. | .. | .. | .. | .. | .. |
| Falkland Islands (Malvinas) | | .. | .. | .. | .. | .. | .. | .. |
| Fiji | | .. | .. | .. | .. | .. | .. | .. |
| Finland | | 11.85 | 11.53 | .. | 11.54 | 11.14 | .. | .. |
| France | | 20.33 | .. | .. | .. | .. | .. | .. |
| French Guiana | | .. | .. | .. | .. | .. | .. | .. |
| French Polynesia | | .. | .. | .. | .. | .. | .. | .. |
| Gabon | | .. | .. | .. | .. | .. | .. | .. |
| Gambia | | 33.66 | 40.40 | 33.15 | .. | 34.75 | 48.04 | .. |
| Georgia | | .. | .. | .. | .. | .. | .. | .. |
| Germany | | 8.32 | 8.17 | 7.90 | 7.81 | 7.70 | .. | .. |
| Ghana | | 35.48 | 32.54 | 33.97 | 32.83 | 29.05 | 28.80 | 29.95 |
| Gibraltar | | .. | .. | .. | 22.18 | 10.94 | .. | .. |
| Greece | | 11.91 | 11.78 | 10.90 | 10.72 | 10.44 | .. | .. |
| Greenland | | .. | .. | .. | .. | .. | .. | .. |
| Grenada | | 13.51 | 12.13 | 11.76 | 11.65 | 12.25 | 12.37 | .. |
| Guadeloupe | | .. | .. | .. | .. | .. | .. | .. |
| Guam | | .. | .. | .. | .. | .. | .. | .. |
| Guatemala | | .. | .. | .. | .. | .. | .. | .. |
| Guernsey | | .. | .. | .. | .. | .. | .. | .. |
| Guinea | | .. | .. | .. | .. | .. | .. | .. |
| Guinea-Bissau | | .. | .. | .. | .. | .. | .. | .. |
| Guyana | | .. | .. | .. | .. | .. | .. | .. |
| Haiti | | .. | .. | .. | .. | .. | .. | .. |
| Holy See | | .. | .. | .. | .. | .. | .. | .. |
| Honduras | | 14.34 | .. | 20.71 | 19.34 | .. | .. | .. |
| Hungary | | 11.14 | 12.82 | 11.93 | 11.80 | .. | .. | .. |
| Iceland | | 4.91 | 4.84 | 4.77 | .. | .. | .. | .. |
| India | | .. | .. | 20.10 | .. | .. | .. | .. |
| Indonesia | | 14.93 | 12.51 | .. | .. | 12.68 | | .. |
| Iran (Islamic Republic of) | | .. | .. | .. | .. | .. | .. | .. |
| Iraq | | .. | .. | .. | .. | .. | .. | .. |
| Ireland | | .. | .. | .. | .. | .. | .. | .. |
| Isle of Man | | .. | .. | .. | .. | .. | .. | .. |
| Israel | | .. | .. | .. | .. | .. | .. | .. |
| Italy | | 12.70 | 12.53 | 12.41 | 12.04 | 11.62 | .. | .. |
| Jamaica | | .. | .. | 11.51 | 10.74 | 10.51 | 10.80 | .. |
| Japan | | 26.00 | 25.48 | 25.19 | 27.30 | 27.68 | .. | .. |
| Jersey | | .. | .. | .. | .. | .. | .. | .. |
| Jordan | | 16.38 | 17.73 | 17.14 | 16.95 | 17.88 | 17.56 | .. |
| Kazakhstan | | 9.47 | 9.35 | .. | .. | .. | .. | .. |
| Kenya | | .. | 26.30 | 29.55 | 28.87 | .. | .. | .. |
| Kiribati | | .. | .. | .. | .. | .. | .. | .. |
| Kuwait | | 10.33 | 9.70 | 9.23 | 9.17 | 8.73 | 8.33 | .. |
| Kyrgyzstan | | .. | .. | .. | .. | .. | .. | .. |
| Lao People's Democratic Republic | | .. | 19.18 | 18.71 | 18.28 | 18.24 | | .. |
| Latvia | | 13.75 | 10.86 | 10.10 | 9.73 | 9.72 | .. | .. |
| Lebanon | | 13.96 | 15.83 | .. | 15.53 | 15.62 | .. | .. |
| Lesotho | | 18.35 | 13.08 | 17.30 | 18.46 | .. | .. | .. |
| Liberia | | .. | 46.49 | 53.25 | 37.68 | 37.31 | .. | .. |
| Libya | | .. | .. | .. | .. | .. | .. | .. |
| Liechtenstein | | .. | 7.65 | 8.40 | 8.04 | 7.58 | .. | .. |
| Lithuania | | .. | .. | 9.50 | 9.26 | 9.67 | .. | .. |
| Luxembourg | | 9.76 | 10.27 | 9.09 | 10.09 | .. | .. | .. |
| Madagascar | | 26.76 | 20.40 | 24.67 | 23.39 | 22.59 | 22.13 | .. |
| Malawi | | .. | .. | 42.05 | .. | .. | .. | .. |
| Malaysia | | 18.98 | 17.90 | 16.59 | 16.46 | 15.32 | 18.11 | .. |
| Maldives | | 19.31 | 16.62 | 16.83 | 15.96 | 15.53 | .. | .. |
| Mali | | 20.54 | 19.67 | 21.23 | 18.82 | 20.33 | 19.64 | .. |
| Malta | | 13.04 | 13.19 | 12.60 | 12.06 | 11.79 | .. | .. |
| Marshall Islands | | .. | .. | .. | .. | .. | .. | .. |
| Martinique | | .. | .. | .. | .. | .. | .. | .. |
| Mauritania | | .. | .. | 19.22 | .. | .. | .. | .. |
| Mauritius | | | | | 12.80 | 12.29 | 12.38 | .. |
| Mayotte | | .. | .. | .. | .. | .. | .. | .. |
| Mexico | | 25.28 | 25.18 | 24.93 | 24.97 | 25.02 | .. | .. |
| Micronesia (Federated States of) | | .. | .. | .. | .. | .. | .. | .. |
| Monaco | | .. | .. | 21.50 | 18.65 | 19.12 | 14.25 | 19.98 |
| Mongolia | | .. | .. | .. | 32.99 | 33.34 | 33.15 | .. |
| Montenegro | | .. | .. | .. | .. | .. | .. | .. |
| Montserrat | | .. | .. | .. | 7.73 | .. | 7.73 | .. |
| Morocco | | .. | .. | .. | .. | .. | .. | .. |
| Mozambique | | .. | .. | .. | .. | .. | .. | .. |
| Myanmar | | .. | .. | .. | 14.74 | 18.99 | 14.95 | .. |
| Namibia | | .. | .. | .. | .. | 37.61 | 22.63 | .. |
| Nauru | | .. | .. | .. | 22.50 | .. | .. | .. |
| Nepal | | 23.11 | 22.68 | 22.05 | 20.76 | 20.36 | .. | 18.61 |
| Netherlands | | 15.44 | 15.50 | 15.50 | 15.74 | 15.89 | .. | .. |
| Netherlands Antilles | | .. | .. | .. | .. | .. | .. | .. |
| New Caledonia | | .. | .. | .. | .. | .. | .. | .. |
| New Zealand | | .. | 8.94 | 8.15 | .. | 7.82 | .. | .. |
| Nicaragua | | .. | .. | .. | .. | .. | .. | .. |
| Niger | | 30.68 | 28.19 | 26.74 | 21.54 | 28.39 | 32.59 | .. |
| Nigeria | | .. | .. | .. | .. | .. | .. | .. |
| Niue | | .. | 5.33 | 5.40 | 6.20 | .. | .. | .. |
| Norfolk Island | | .. | .. | .. | .. | .. | .. | .. |
| North Macedonia | | .. | .. | .. | .. | .. | .. | .. |
| Northern Mariana Islands | | .. | .. | .. | .. | .. | .. | .. |
| Norway | | .. | .. | .. | 10.28 | 13.26 | .. | .. |
| Oman | | 25.68 | 27.99 | 25.25 | 24.92 | 22.56 | 20.77 | .. |
| Pakistan | | .. | .. | .. | .. | .. | .. | .. |
| Palau | | .. | 17.86 | .. | .. | .. | .. | .. |
| Palestine | | 17.87 | 19.34 | 22.91 | 23.12 | 16.85 | 16.70 | .. |
| Panama | | 18.63 | 20.38 | 18.41 | 15.04 | 15.39 | .. | .. |
| Papua New Guinea | | .. | .. | .. | 41.62 | .. | .. | .. |
| Paraguay | | .. | .. | .. | .. | .. | .. | .. |
| Peru | | .. | .. | 18.15 | 18.95 | 19.11 | 19.55 | .. |
| Philippines | | .. | .. | 29.64 | 33.63 | 27.08 | .. | .. |
| Pitcairn | | .. | .. | .. | .. | .. | .. | .. |
| Poland | | 14.99 | 14.92 | .. | .. | 12.97 | .. | .. |
| Portugal | | 16.33 | 17.05 | 17.20 | 16.96 | 16.56 | .. | .. |
| Puerto Rico | | 24.93 | .. | 17.83 | 17.50 | .. | .. | .. |
| Qatar | | 15.42 | 13.92 | 14.17 | 14.54 | 14.40 | 14.83 | .. |
| Republic of Korea | | 14.67 | 13.63 | 13.36 | 13.25 | 13.03 | .. | .. |
| Republic of Moldova | | .. | .. | .. | 13.39 | 13.33 | 11.88 | .. |
| Réunion | | .. | .. | .. | .. | .. | .. | .. |
| Romania | | 16.57 | 16.05 | 15.94 | 15.46 | 15.19 | .. | .. |
| Russian Federation | | .. | .. | .. | .. | .. | .. | .. |
| Rwanda | | 41.24 | 34.10 | 34.10 | 31.69 | 32.36 | 36.10 | .. |
| Saint Helena | | .. | .. | .. | .. | .. | .. | .. |
| Saint Kitts and Nevis | | | 12.46 | 10.58 | .. | .. | .. | .. |
| Saint Lucia | | 9.80 | 10.23 | .. | 5.94 | .. | .. | .. |
| Saint Pierre and Miquelon | | .. | .. | .. | .. | .. | .. | .. |
| Saint Vincent and the Grenadines | | | .. | 10.48 | 7.39 | 7.88 | 5.59 | .. |
| Saint-Barthélemy | | .. | .. | .. | .. | .. | .. | .. |
| Saint-Martin (French part) | | .. | .. | .. | .. | .. | .. | .. |
| Samoa | | .. | 11.48 | 12.15 | 11.84 | 13.21 | 11.75 | .. |
| San Marino | | .. | .. | .. | .. | .. | 7.05 | .. |
| Sao Tome and Principe | | 17.75 | 15.01 | 13.01 | .. | .. | .. | .. |
| Saudi Arabia | | 9.63 | 10.82 | 13.09 | 10.82 | 11.33 | 15.04 | .. |
| Senegal | | 17.59 | 17.22 | 16.99 | 21.65 | 22.01 | 29.80 | .. |
| Serbia | | 12.70 | 12.74 | 12.14 | 11.92 | 11.91 | 11.64 | .. |
| Seychelles | | 15.08 | 16.56 | 17.56 | 16.68 | 16.35 | 18.24 | .. |
| Sierra Leone | | 18.83 | .. | 19.30 | 22.67 | 13.84 | .. | .. |
| Singapore | | .. | .. | .. | .. | .. | .. | .. |
| Sint Maarten (Dutch part) | | .. | .. | .. | .. | .. | .. | .. |
| Slovakia | | 12.63 | 12.57 | 12.44 | 12.21 | 11.97 | .. | .. |
| Slovenia | | 9.19 | 9.16 | 9.09 | 9.11 | .. | .. | .. |
| Solomon Islands | | 33.84 | 33.22 | 24.23 | .. | 26.03 | 23.35 | .. |
| Somalia | | .. | .. | .. | .. | .. | .. | .. |
| South Africa | | | | .. | .. | .. | .. | .. |
| South Sudan | | .. | .. | 34.67 | .. | .. | .. | .. |
| Spain | | 13.92 | 14.16 | 14.04 | 13.60 | 13.44 | .. | .. |
| Sri Lanka | | .. | .. | .. | .. | 13.83 | 13.09 | .. |
| Sudan | | 32.40 | 26.30 | .. | 25.36 | 25.84 | .. | .. |
| Sudan (pre-secession) | | .. | .. | .. | .. | .. | .. | .. |
| Suriname | | 27.65 | 26.50 | 26.06 | 22.27 | 27.73 | 19.58 | .. |
| Svalbard and Jan Mayen Islands | | .. | .. | .. | .. | .. | .. | .. |
| Sweden | | 6.00 | 5.52 | 5.63 | 5.56 | 5.52 | .. | .. |
| Switzerland | | 11.90 | 11.71 | .. | 11.73 | 11.67 | .. | .. |
| Syrian Arab Republic | | 15.91 | .. | .. | .. | .. | .. | .. |
| Tajikistan | | 13.48 | 13.91 | 14.37 | 12.93 | 11.44 | .. | .. |
| Thailand | | .. | .. | .. | .. | .. | .. | .. |
| Timor-Leste | | .. | .. | 30.87 | 31.99 | 33.18 | 31.80 | .. |
| Togo | | 29.24 | 30.01 | 30.68 | .. | 29.19 | 28.44 | .. |
| Tokelau | | .. | .. | .. | 4.33 | .. | .. | .. |
| Tonga | | .. | 12.37 | 10.53 | .. | .. | .. | .. |
| Trinidad and Tobago | | .. | .. | .. | .. | .. | .. | .. |
| Tunisia | | .. | 16.85 | 15.78 | 15.24 | .. | .. | .. |
| Turkey | | 17.13 | 16.73 | 17.00 | .. | 17.20 | .. | .. |
| Turkmenistan | | .. | .. | .. | .. | .. | .. | .. |
| Turks and Caicos Islands | | .. | .. | .. | .. | .. | 43.08 | .. |
| Tuvalu | | .. | 12.68 | 10.68 | 10.62 | .. | 8.44 | .. |
| Uganda | | 29.22 | 28.26 | 22.39 | 21.39 | 22.03 | .. | .. |
| Ukraine | | .. | .. | .. | .. | .. | .. | .. |
| United Arab Emirates | | 15.74 | 18.77 | 23.36 | 29.27 | .. | .. | .. |
| United Kingdom of Great Britain and Northern Ireland | | .. | 19.36 | .. | .. | 61.81 | .. | .. |
| United Republic of Tanzania | | .. | 76.94 | .. | 104.36 | 113.97 | .. | .. |
| United States of America | | .. | 13.82 | 13.76 | .. | 14.28 | .. | .. |
| United States Virgin Islands | | .. | .. | .. | .. | .. | .. | .. |
| Uruguay | | .. | .. | .. | .. | .. | .. | .. |
| Uzbekistan | | 9.90 | 9.98 | 10.77 | 10.87 | 11.58 | 11.58 | .. |
| Vanuatu | | 15.35 | .. | 15.51 | .. | .. | .. | .. |
| Venezuela (Bolivarian Republic of) | | .. | .. | .. | .. | .. | .. | .. |
| Viet Nam | | 18.87 | 17.63 | 17.42 | 17.14 | 17.58 | 17.27 | .. |
| Wallis and Futuna Islands | | .. | .. | .. | .. | .. | .. | .. |
| Western Sahara | | .. | .. | .. | .. | .. | .. | .. |
| Yemen | | .. | .. | .. | 26.41 | .. | .. | .. |
| Zambia | | .. | .. | .. | .. | .. | .. | .. |
| Zimbabwe | | 37.44 | .. | .. | .. | .. | .. | .. |
Sustainable Development Goal Regions | | .. | .. | .. | .. | .. | .. | .. |
| World | | 18.27 | 17.75 | 17.71 | | 17.72 | | .. |
| Landlocked Developing Countries | | | | | | | | .. |
| Least Developed Countries | | | | | | | | .. |
| Small Island Developing States | | | | | | | .. | .. |
| Africa (Sub-Saharan) | | | 30.07 | | | | | .. |
| Western Asia and Northern Africa | | | | | | 19.20 | | .. |
| Africa (Northern) | | | | | 23.58 | | | .. |
| Asia (Western) | | 15.11 | | | | | | .. |
| Asia (Central and Southern) | | | | | | .. | .. | .. |
| Asia (Central) | | 10.83 | 10.69 | | | | | .. |
| Asia (Southern) | | | | | | .. | .. | .. |
| Asia (Eastern and South-eastern) | | 21.03 | 19.65 | 18.94 | 18.47 | 17.71 | 17.23 | .. |
| Asia (Eastern) | | 22.09 | 20.93 | 19.92 | 19.21 | 18.28 | 17.56 | .. |
| Asia (South-eastern) | | 18.31 | 16.52 | | | 16.13 | 16.24 | .. |
| Latin America and the Caribbean | | 20.92 | 20.94 | 20.70 | 20.63 | 20.55 | | .. |
| Oceania | | | | | | | .. | .. |
| Oceania (Australia/New Zealand) | | .. | .. | .. | .. | .. | .. | .. |
| Oceania (excl. Australia/New Zealand) | | | | | 33.99 | | .. | .. |
| Northern America and Europe | | 11.89 | 11.85 | | | 11.93 | | .. |
| Europe | | 11.21 | | | | | | .. |
| Northern America | | 13.99 | 14.07 | 14.02 | | 14.55 | | .. |
UIS Regions | | .. | .. | .. | .. | .. | .. | .. |
| World | | 18.27 | 17.75 | 17.71 | | 17.72 | | .. |
| Arab States | | | | | 20.47 | | | .. |
| Central and Eastern Europe | | | | | | | .. | .. |
| Central Asia | | 11.28 | 11.28 | | | | | .. |
| East Asia and the Pacific | | 21.03 | 19.65 | 18.93 | 18.45 | 17.71 | 17.22 | .. |
| Latin America and the Caribbean | | 20.92 | 20.94 | 20.70 | 20.63 | 20.54 | | .. |
| North America and Western Europe | | 13.14 | 13.12 | 13.32 | | 13.61 | | .. |
| South and West Asia | | | | | | .. | .. | .. |
| Sub-Saharan Africa | | | 30.11 | | | | | .. |
| Small Island Developing States | | | | | | | .. | .. |
World Bank Income Groups | | .. | .. | .. | .. | .. | .. | .. |
| Low income countries | | | | | | | | .. |
| Lower middle income countries | | | | | | | | .. |
| Middle income countries | | | 18.43 | 18.27 | | 17.87 | | .. |
| Upper middle income countries | | 18.86 | 18.32 | 17.71 | 17.30 | 16.82 | | .. |
| High income countries | | 14.09 | 14.03 | 14.11 | | 14.32 | | .. |