| Country | Value |
|---|---|
| Afghanistan | 8 |
| Albania | 2.5 |
| Algeria | 2.9 |
| Angola | 6.9 |
| Argentina | 2.6 |
| Armenia | 1.8 |
| Aruba | 2.2 |
| Australia | 1.8 |
| Austria | 1.4 |
| Azerbaijan | 2.2 |
| Bahamas | 2.4 |
| Bahrain | 2.8 |
| Bangladesh | 3.5 |
| Barbados | 1.5 |
| Belarus | 1.3 |
| Belgium | 1.6 |
| Belize | 3.9 |
| Benin | 6.3 |
| Bhutan | 4.2 |
| Bolivia | 4.3 |
| Bosnia and Herzegovina | 1.5 |
| Botswana | 3.7 |
| Brazil | 2.5 |
| Brunei | 2.7 |
| Bulgaria | 1.2 |
| Burkina Faso | 6.8 |
| Burundi | 6.8 |
| Cambodia | 4.5 |
| Cameroon | 5.1 |
| Canada | 1.6 |
| Cape Verde | 4.1 |
| Central African Republic | 5.3 |
| Chad | 6.6 |
| Channel Islands | 1.4 |
| Chile | 2.2 |
| China | 1.8 |
| Colombia | 2.7 |
| Comoros | 5.4 |
| Congo | 4.9 |
| Congo Dem. Rep. | 6.7 |
| Costa Rica | 2.6 |
| Côte d’Ivoire | 5.6 |
| Croatia | 1.5 |
| Cuba | 1.6 |
| Cyprus | 1.9 |
| Czech Republic | 1.2 |
| Denmark | 1.8 |
| Djibouti | 5.1 |
| Dominican Republic | 3.1 |
| Ecuador | 3.1 |
| Egypt | 3.5 |
| El Salvador | 3.2 |
| Equatorial Guinea | 5.9 |
| Eritrea | 5.9 |
| Estonia | 1.3 |
| Ethiopia | 6.3 |
| Federated States of Micronesia | 4.5 |
| Fiji | 3.2 |
| Finland | 1.7 |
| France | 1.8 |
| French Guiana | 3.9 |
| French Polynesia | 2.6 |
| Gabon | 3.8 |
| Gambia The | 5.5 |
| Georgia | 1.6 |
| Germany | 1.3 |
| Ghana | 4.8 |
| Greece | 1.3 |
| Grenada | 2.8 |
| Guadeloupe | 2.1 |
| Guam | 3 |
| Guatemala | 5 |
| Guinea | 6.2 |
| Guinea-Bissau | 7.1 |
| Guyana | 2.5 |
| Haiti | 4.6 |
| Honduras | 4.3 |
| Hong Kong SAR | 1.1 |
| Hungary | 1.4 |
| Iceland | 2.1 |
| India | 3.5 |
| Indonesia | 2.6 |
| Iran | 2.5 |
| Iraq | 5.4 |
| Ireland | 1.9 |
| Israel | 2.9 |
| Italy | 1.2 |
| Jamaica | 2.7 |
| Japan | 1.4 |
| Jordan | 4.3 |
| Kazakhstan | 2 |
| Kenya | 5 |
| Korea DPR | 2.1 |
| Korea Rep | 1.5 |
| Kuwait | 2.6 |
| Kyrgyzstan | 3 |
| Lao PDR | 4.7 |
| Latvia | 1.2 |
| Lebanon | 2.7 |
| Lesotho | 4.4 |
| Liberia | 6.8 |
| Libya | 3.4 |
| Lithuania | 1.5 |
| Luxembourg | 1.7 |
| Macau SAR | 1.1 |
| Macedonia | 1.7 |
| Madagascar | 5.8 |
| Malawi | 6.4 |
| Malaysia | 3.1 |
| Maldives | 3.8 |
| Mali | 7.2 |
| Malta | 1.8 |
| Martinique | 1.9 |
| Mauritania | 5.3 |
| Mauritius | 2.1 |
| Mexico | 2.7 |
| Mongolia | 2.4 |
| Montenegro | 1.8 |
| Morocco | 3 |
| Mozambique | 5.8 |
| Myanmar | 2.7 |
| Namibia | 4.4 |
| Nepal | 4.4 |
| Netherlands | 1.6 |
| Netherlands Antilles | 2.1 |
| New Caledonia | 2.6 |
| New Zealand | 2 |
| Nicaragua | 3.6 |
| Niger | 7.7 |
| Nigeria | 6.2 |
| Norway | 1.9 |
| Oman | 5.1 |
| Pakistan | 5 |
| Palestinian Territory, Occupied | 6 |
| Panama | 2.8 |
| Papua New Guinea | 4.6 |
| Paraguay | 3.9 |
| Peru | 3.1 |
| Philippines | 3.7 |
| Poland | 1.5 |
| Portugal | 1.5 |
| Puerto Rico | 2 |
| Qatar | 3.4 |
| Republic of Moldova | 1.7 |
| Reunion | 2.3 |
| Romania | 1.3 |
| Russian Federation | 1.2 |
| Rwanda | 6.1 |
| Sahrawi | 3.5 |
| Saint Lucia | 2.4 |
| Samoa | 4.7 |
| Sao Tome and Principe | 4.8 |
| Saudi Arabia | 4.6 |
| Senegal | 5.7 |
| Serbia | 1.7 |
| Sierra Leone | 6.5 |
| Singapore | 1.6 |
| Slovakia | 1.4 |
| Slovenia | 1.3 |
| Solomon Islands | 4.9 |
| Somalia | 6.8 |
| South Africa | 3 |
| Spain | 1.2 |
| Sri Lanka | 2.2 |
| St Vincent and the Grenadines | 2.4 |
| Sudan | 5.4 |
| Suriname | 2.8 |
| Swaziland | 4.5 |
| Sweden | 1.6 |
| Switzerland | 1.5 |
| Syria | 4 |
| Tajikistan | 4.3 |
| Tanzania | 5.7 |
| Thailand | 1.9 |
| Timor Leste | 7 |
| Togo | 5.8 |
| Tonga | 4 |
| Trinidad and Tobago | 1.7 |
| Tunisia | 2.3 |
| Turkey | 2.6 |
| Turkmenistan | 3 |
| Uganda | 6.9 |
| Ukraine | 1.2 |
| United Arab Emirates | 3.1 |
| United Kingdom | 1.7 |
| United States of America | 2 |
| United States Virgin Islands | 2.4 |
| Uruguay | 2.3 |
| Uzbekistan | 3 |
| Vanuatu | 4.6 |
| Venezuela | 2.9 |
| Vietnam | 2.5 |
| Yemen | 6.7 |
| Zambia | 6 |
| Zimbabwe | 4.1 |
