| Country name | 2008 | 2009 | 2010 | 2011 | ||
|---|---|---|---|---|---|---|
| Iceland | 0.0 | 0.1 |
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| Mauritius | 0.2 | 0.1 | 0.1 |
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| Lao PDR | 0.3 | 0.2 | 0.2 |
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| Ghana | 0.4 | 0.4 | 0.4 | 0.3 |
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| Guatemala | 0.4 | 0.4 | 0.4 | 0.4 |
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| Mexico | 0.5 | 0.5 | 0.5 | 0.5 |
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| Liberia | 0.5 | 0.6 | 0.7 |
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| Papua New Guinea | 0.5 | 0.5 | 0.5 | 0.5 |
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| Nicaragua | 0.5 | 0.6 | 0.5 | 0.6 |
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| Cape Verde | 0.5 | 0.5 | 0.5 | 0.5 |
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| Ireland | 0.6 | 0.6 | 0.6 | 0.6 |
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| Moldova | 0.6 | 0.5 | 0.3 | 0.3 |
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| Indonesia | 0.6 | 0.6 | 0.7 | 0.7 |
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| Malta | 0.7 | 0.7 | 0.7 | 0.7 |
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| Paraguay | 0.7 | 0.9 | 0.8 | 1.1 |
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| Dominican Republic | 0.7 | 0.7 | 0.7 | 0.6 |
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| Switzerland | 0.8 | 0.8 | 0.7 | 0.8 |
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| Nigeria | 0.8 | 0.9 | 0.9 | 1.0 |
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| Mozambique | 0.8 | 0.9 |
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| Argentina | 0.8 | 1.0 | 0.9 | 0.7 |
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| Austria | 0.9 | 0.9 | 0.9 | 0.9 |
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| Tanzania | 0.9 | 1.0 | 1.1 | 1.1 |
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| Japan | 1.0 | 1.0 | 1.0 | 1.0 |
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| Jamaica | 1.0 | 0.9 | 0.8 |
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| Honduras | 1.0 | 1.1 | 1.1 | 1.1 |
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| Sierra Leone | 1.0 | 1.1 | 1.0 | 0.9 |
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| El Salvador | 1.0 | 1.0 | 1.0 | 1.0 |
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| Niger | 1.0 | 0.9 |
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| Benin | 1.0 | |||||
| Cambodia | 1.0 | 1.9 | 1.6 | 1.5 |
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| New Zealand | 1.1 | 1.1 | 1.1 | 1.1 |
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| Peru | 1.1 | 1.3 | 1.3 | 1.2 |
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| Madagascar | 1.1 | 0.8 | 0.6 | 0.7 |
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| Bangladesh | 1.1 | 1.2 | 1.3 | 1.3 |
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| Seychelles | 1.1 | 1.0 | 0.9 | 0.9 |
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| Kazakhstan | 1.2 | 1.1 | 1.0 | 1.0 |
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| Spain | 1.2 | 1.2 | 1.1 | 1.0 |
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| Libya | 1.2 | |||||
| Mongolia | 1.2 | 0.8 | 0.9 | 0.9 |
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| Congo, Rep. | 1.2 | 1.1 |
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| Hungary | 1.2 | 1.2 | 1.1 | 1.0 |
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| Sweden | 1.2 | 1.2 | 1.3 | 1.3 |
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| Belgium | 1.2 | 1.2 | 1.1 | 1.1 |
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| Bosnia and Herzegovina | 1.3 | 1.4 | 1.3 | 1.4 |
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| Canada | 1.3 | 1.4 | 1.5 | 1.4 |
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| Tunisia | 1.3 | 1.3 | 1.3 | 1.3 |
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| Czech Republic | 1.3 | 1.4 | 1.3 | 1.1 |
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| Philippines | 1.3 | 1.3 | 1.2 | 1.1 |
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| South Africa | 1.3 | 1.4 | 1.3 | 1.3 |
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| Germany | 1.3 | 1.4 | 1.4 | 1.3 |
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| Finland | 1.3 | 1.5 | 1.4 | 1.5 |
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| Guyana | 1.4 | 1.4 | 1.3 | 1.2 |
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| Congo, Dem. Rep. | 1.4 | 1.1 | 1.4 | 1.5 |
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| Venezuela, RB | 1.4 | 1.2 | 0.9 | 0.8 |
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| Belize | 1.4 | 1.3 | 1.1 | 1.1 |
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| Denmark | 1.4 | 1.4 | 1.4 | 1.5 |
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| Norway | 1.4 | 1.7 | 1.5 | 1.6 |
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| Lithuania | 1.4 | 1.4 | 1.1 | 1.0 |
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| Netherlands | 1.4 | 1.5 | 1.4 | 1.4 |
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| Rwanda | 1.4 | 2.2 | 1.3 | 1.2 |
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| Belarus | 1.5 | 1.4 | 1.4 | 1.1 |
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| Cameroon | 1.5 | 1.5 | 1.6 | 1.4 |
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| Romania | 1.5 | 1.4 | 1.3 | 1.1 |
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| Burkina Faso | 1.5 | 1.3 | 1.3 | 1.3 |
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| Slovak Republic | 1.5 | 1.5 | 1.3 | 1.1 |
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| Fiji | 1.5 | 1.8 | 1.6 |
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| Ethiopia | 1.5 | 1.2 | 1.1 | 1.1 |
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| Slovenia | 1.5 | 1.6 | 1.6 | 1.4 |
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| Brazil | 1.5 | 1.6 | 1.6 | 1.4 |
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| Thailand | 1.6 | 1.9 | 1.5 | 1.6 |
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| Cote d'Ivoire | 1.6 | 1.8 | 1.7 | 1.5 |
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| Central African Republic | 1.6 | 1.8 | 2.6 |
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| Nepal | 1.6 | 1.6 | 1.6 | 1.4 |
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| Senegal | 1.6 | 1.6 | 1.6 |
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| Lesotho | 1.7 | 2.8 | 3.2 | 2.4 |
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| Latvia | 1.7 | 1.4 | 1.1 | 1.0 |
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| Poland | 1.7 | 1.8 | 1.9 | 1.9 |
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| Macedonia, FYR | 1.8 | 1.7 | 1.4 | 1.3 |
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| Italy | 1.8 | 1.8 | 1.7 | 1.6 |
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| Cyprus | 1.8 | 2.0 | 2.1 | 2.2 |
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| Togo | 1.8 | 1.8 | 1.6 |
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| Croatia | 1.9 | 1.8 | 1.7 | 1.7 |
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| Montenegro | 1.9 | 1.9 | 1.8 | 2.0 |
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| Australia | 1.9 | 1.9 | 2.0 | 1.9 |
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| Kenya | 1.9 | 1.9 | 1.9 | 1.5 |
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| Portugal | 1.9 | 2.1 | 2.1 | 2.0 |
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| Malaysia | 1.9 | 2.0 | 1.6 | 1.6 |
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| Iran, Islamic Rep. | 1.9 | |||||
| Uruguay | 2.0 | 2.1 | 2.0 | 1.9 |
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| Bolivia | 2.0 | 2.0 | 1.7 | 1.5 |
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| Albania | 2.0 | 2.1 | 1.6 | 1.5 |
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| Mali | 2.0 | 1.9 | 1.9 | 1.8 |
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| Bulgaria | 2.0 | 2.0 | 1.9 | 1.5 |
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| China | 2.0 | 2.2 | 2.0 | 2.0 |
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| Zambia | 2.0 | 1.7 | 1.7 | 1.6 |
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| Estonia | 2.1 | 2.3 | 1.7 | 1.7 |
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| Afghanistan | 2.2 | 2.0 | 3.7 | 4.7 |
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| Qatar | 2.2 | |||||
| Swaziland | 2.2 | 3.2 | 3.2 | 3.0 |
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| Egypt, Arab Rep. | 2.3 | 2.1 | 2.0 | 1.9 |
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| Turkey | 2.3 | 2.6 | 2.4 | 2.3 |
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| Serbia | 2.3 | 2.4 | 2.2 | 2.1 |
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| France | 2.3 | 2.6 | 2.3 | 2.2 |
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| Vietnam | 2.3 | 2.5 | 2.5 | 2.2 |
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| Botswana | 2.5 | 2.9 | 2.4 | 2.1 |
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| United Kingdom | 2.5 | 2.7 | 2.6 | 2.6 |
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| Brunei Darussalam | 2.5 | 3.3 | 3.2 | 2.5 |
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| Uganda | 2.5 | 2.1 | 1.8 | 1.6 |
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| India | 2.6 | 2.9 | 2.7 | 2.5 |
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| Ukraine | 2.7 | 2.9 | 2.7 | 2.5 |
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| Burundi | 2.7 | |||||
| Korea, Rep. | 2.8 | 2.9 | 2.7 | 2.8 |
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| Bahrain | 3.0 | 4.0 | 3.4 |
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| Namibia | 3.0 | 3.4 | 3.6 | 3.4 |
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| Algeria | 3.0 | 3.8 | 3.5 | 4.6 |
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| Kuwait | 3.0 | 4.1 | 3.8 | 3.2 |
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| Ecuador | 3.0 | 3.7 | 3.6 | 3.5 |
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| Greece | 3.1 | 3.3 | 2.4 | 2.8 |
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| Azerbaijan | 3.3 | 3.3 | 2.8 | 4.9 |
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| Cuba | 3.3 | 3.3 |
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| Morocco | 3.3 | 3.4 | 3.5 | 3.3 |
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| Iraq | 3.3 | 4.6 | 4.4 | 5.1 |
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| Chile | 3.3 | 3.1 | 3.0 | 3.2 |
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| Armenia | 3.4 | 4.2 | 4.2 | 4.0 |
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| Kyrgyz Republic | 3.4 | 3.5 | 4.2 |
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| Pakistan | 3.4 | 3.2 | 3.3 | 3.0 |
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| Mauritania | 3.4 | 3.8 |
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| Russian Federation | 3.5 | 4.4 | 3.9 | 3.9 |
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| Syrian Arab Republic | 3.6 | 4.0 | 3.9 |
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| Timor-Leste | 3.6 | 4.6 | 3.5 | 2.6 |
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| Djibouti | 3.7 | |||||
| Colombia | 3.7 | 3.9 | 3.6 | 3.3 |
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| Sri Lanka | 3.7 | 3.6 | 3.0 | 2.6 |
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| Angola | 3.8 | 4.4 | 4.2 | 3.5 |
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| Lebanon | 3.9 | 4.1 | 4.4 | 4.4 |
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| Singapore | 4.2 | 4.4 | 3.7 | 3.6 |
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| United Arab Emirates | 4.3 | 5.8 | 5.4 |
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| United States | 4.4 | 4.8 | 4.8 | 4.7 |
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| Yemen, Rep. | 4.4 | |||||
| South Sudan | 5.9 | 5.1 | 3.2 | 2.9 |
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| Jordan | 6.1 | 5.9 | 5.2 | 4.7 |
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| Israel | 7.1 | 7.0 | 6.5 | 6.8 |
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| Chad | 7.3 | 6.2 | 2.6 | 2.3 |
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| Oman | 7.6 | 9.6 | 8.5 | 6.0 |
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| Saudi Arabia | 8.0 | 11.0 | 10.0 | 8.4 |
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| Georgia | 8.5 | 5.6 | 3.9 | 3.0 |
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| St. Lucia | ||||||
| Luxembourg | ||||||
| Cayman Islands | ||||||
| Liechtenstein | ||||||
| Dominica | ||||||
| Kosovo | ||||||
| Andorra | ||||||
| Korea, Dem. Rep. | ||||||
| Suriname | ||||||
| Kiribati | ||||||
| Comoros | ||||||
| Palau | ||||||
| Tuvalu | ||||||
| Puerto Rico | ||||||
| American Samoa | ||||||
| Macao SAR, China | ||||||
| St. Vincent and the Grenadines | ||||||
| Isle of Man | ||||||
| Eritrea | ||||||
| Hong Kong SAR, China | ||||||
| Curacao | ||||||
| Haiti | ||||||
| Tonga | ||||||
| Samoa | ||||||
| Turkmenistan | ||||||
| San Marino | ||||||
| Panama | ||||||
| Sao Tome and Principe | ||||||
| West Bank and Gaza | ||||||
| Malawi | ||||||
| Maldives | ||||||
| Guinea-Bissau | ||||||
| St. Martin (French part) | ||||||
| Guinea | ||||||
| Sudan | ||||||
| Guam | ||||||
| Faeroe Islands | ||||||
| Grenada | ||||||
| Equatorial Guinea | ||||||
| Marshall Islands | ||||||
| Tajikistan | ||||||
| Sint Maarten (Dutch part) | ||||||
| Costa Rica | ||||||
| Greenland | ||||||
| Northern Mariana Islands | ||||||
| Barbados | ||||||
| Trinidad and Tobago | ||||||
| Bahamas, The | ||||||
| Bhutan | ||||||
| Aruba | ||||||
| Turks and Caicos Islands | ||||||
| Vanuatu | ||||||
| Bermuda | ||||||
| Solomon Islands | ||||||
| Micronesia, Fed. Sts. | ||||||
| Somalia | ||||||
| Monaco | ||||||
| Gambia, The | ||||||
| Uzbekistan | ||||||
| Myanmar | ||||||
| Antigua and Barbuda | ||||||
| Gabon | 0.9 | |||||
| Virgin Islands (U.S.) | ||||||
| French Polynesia | ||||||
| New Caledonia | ||||||
| St. Kitts and Nevis | ||||||
| Zimbabwe | 1.3 | 1.6 |
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