| Country name | 2008 | 2009 | 2010 | 2011 | ||
|---|---|---|---|---|---|---|
| Qatar | 0.0 | 0.0 | 0.0 |
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| Bahrain | 0.0 | 0.0 | 0.0 |
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| Oman | 0.0 | 0.0 | 0.0 |
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| Malta | 0.0 | 0.0 | 0.0 |
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| Brunei Darussalam | 0.0 | 0.0 | 0.0 |
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| Kuwait | 0.0 | 0.0 | 0.0 |
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| Tajikistan | 0.0 | 0.0 | 0.0 |
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| Azerbaijan | 0.0 | 0.0 | 0.0 |
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| Turkmenistan | 0.0 | 0.0 | 0.0 |
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| Uzbekistan | 0.0 | 0.0 | 0.0 |
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| Saudi Arabia | 0.0 | 0.0 | 0.0 |
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| Iceland | 0.1 | 0.0 | 0.0 | 0.0 |
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| Syrian Arab Republic | 0.0 | 0.0 | 0.0 |
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| Armenia | 0.0 | 0.0 | 0.0 |
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| United Arab Emirates | 0.0 | 0.0 | 0.0 |
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| Jordan | 0.1 | 0.1 | 0.1 |
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| Iraq | 0.1 | 0.1 | 0.1 |
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| Kazakhstan | 0.1 | 0.1 | 0.1 |
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| Kyrgyz Republic | 0.1 | 0.1 | 0.1 |
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| Trinidad and Tobago | 0.1 | 0.1 | 0.1 |
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| Israel | 0.0 | 0.1 | 0.1 | 0.1 |
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| Iran, Islamic Rep. | 0.2 | 0.1 | 0.1 |
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| Algeria | 0.2 | 0.2 | 0.2 |
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| Hong Kong SAR, China | 0.4 | 0.4 | 0.4 |
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| Libya | 0.7 | 0.7 | 0.9 |
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| Russian Federation | 0.9 | 1.0 | 1.0 |
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| Ukraine | 0.7 | 1.3 | 1.1 |
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| Korea, Rep. | 1.3 | 1.3 | 1.4 | 1.3 |
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| Singapore | 1.5 | 1.3 | 1.2 |
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| Venezuela, RB | 1.4 | 1.4 | 1.2 |
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| Yemen, Rep. | 1.4 | 1.4 | 1.5 |
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| Japan | 1.4 | 1.4 | 1.4 | 1.4 |
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| Cyprus | 1.8 | 1.8 | 1.8 |
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| Lebanon | 2.6 | 1.9 | 1.9 |
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| Egypt, Arab Rep. | 2.1 | 2.2 | 2.1 |
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| Ireland | 1.9 | 2.3 | 2.6 | 2.8 |
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| United Kingdom | 2.3 | 2.7 | 2.9 | 3.3 |
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| Bosnia and Herzegovina | 3.1 | 3.0 | 2.9 |
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| Argentina | 3.6 | 3.1 | 3.3 |
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| Morocco | 3.2 | 3.2 | 2.9 |
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| Moldova | 2.8 | 3.3 | 3.2 |
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| Greece | 3.4 | 3.4 | 3.9 | 4.0 |
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| Luxembourg | 3.6 | 3.4 | 3.7 | 3.5 |
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| United States | 3.7 | 3.9 | 4.1 | 4.0 |
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| Croatia | 3.7 | 4.2 | 4.7 |
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| Italy | 3.0 | 4.3 | 5.1 | 5.7 |
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| Bulgaria | 3.8 | 4.3 | 5.1 |
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| Australia | 4.6 | 4.4 | 4.2 | 4.5 |
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| Netherlands | 4.0 | 4.4 | 4.2 | 4.7 |
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| Canada | 4.5 | 4.7 | 4.8 | 4.7 |
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| Turkey | 4.9 | 4.8 | 4.3 | 4.0 |
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| Mexico | 4.8 | 4.8 | 4.7 | 4.5 |
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| Belgium | 4.0 | 4.8 | 5.1 | 5.5 |
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| Malaysia | 4.7 | 4.9 | 4.7 |
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| Montenegro | 2.6 | 5.0 | 3.1 |
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| Spain | 4.1 | 5.0 | 5.3 | 5.8 |
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| Norway | 4.9 | 5.1 | 5.1 | 5.5 |
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| Slovak Republic | 3.7 | 5.2 | 5.4 | 5.7 |
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| Ecuador | 5.9 | 5.4 | 5.3 |
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| Korea, Dem. Rep. | 5.2 | 5.5 | 5.7 |
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| Mongolia | 5.7 | 5.6 | 4.5 |
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| Czech Republic | 4.9 | 5.6 | 6.0 | 6.8 |
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| France | 5.2 | 5.7 | 6.0 | 5.7 |
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| Belarus | 5.5 | 6.0 | 6.2 |
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| New Zealand | 6.6 | 6.1 | 6.5 | 6.5 |
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| Serbia | 4.8 | 7.0 | 6.6 |
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| Poland | 6.0 | 7.1 | 7.5 | 8.1 |
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| Hungary | 5.8 | 7.1 | 7.3 | 7.4 |
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| Macedonia, FYR | 5.7 | 7.2 | 7.1 |
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| Germany | 6.9 | 7.8 | 9.0 | 9.9 |
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| Switzerland | 8.4 | 8.3 | 8.9 | 9.0 |
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| Slovenia | 6.7 | 8.6 | 9.3 | 9.1 |
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| China | 9.7 | 9.0 | 8.5 |
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| South Africa | 9.5 | 9.8 | 10.5 |
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| Kosovo | 11.0 | 9.9 | 9.7 |
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| Albania | 10.3 | 10.1 | 9.9 |
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| Romania | 9.9 | 11.3 | 11.8 |
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| Colombia | 12.1 | 11.4 | 10.3 |
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| Lithuania | 10.3 | 11.5 | 14.3 |
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| Georgia | 12.6 | 12.3 | 11.5 |
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| Tunisia | 13.2 | 12.9 | 14.0 |
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| Namibia | 12.3 | 13.0 | 13.0 |
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| Cuba | 13.7 | 13.1 | 11.6 |
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| Portugal | 13.0 | 13.8 | 13.5 | 13.9 |
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| Estonia | 11.6 | 14.7 | 14.7 | 13.1 |
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| Panama | 17.5 | 14.8 | 12.8 |
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| Peru | 12.5 | 15.9 | 16.3 |
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| Jamaica | 11.2 | 15.9 | 14.6 |
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| Denmark | 15.8 | 16.8 | 18.6 | 20.6 |
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| Costa Rica | 18.3 | 16.8 | 17.3 |
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| Austria | 16.4 | 17.5 | 17.8 | 16.7 |
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| Bolivia | 17.8 | 17.8 | 24.4 |
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| El Salvador | 22.5 | 18.3 | 18.4 |
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| Philippines | 17.3 | 18.3 | 17.0 |
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| Chile | 17.6 | 18.7 | 15.9 | 15.7 |
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| Thailand | 18.8 | 19.3 | 19.2 |
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| Finland | 21.9 | 21.0 | 22.6 | 23.6 |
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| Dominican Republic | 21.9 | 22.3 | 21.4 |
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| Sweden | 20.0 | 22.9 | 23.2 | 21.9 |
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| Botswana | 22.1 | 23.8 | 21.5 |
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| India | 26.5 | 24.9 | 24.6 |
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| Uruguay | 24.0 | 25.3 | 30.9 |
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| Indonesia | 27.9 | 26.5 | 26.0 |
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| Vietnam | 30.1 | 27.5 | 24.8 |
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| Bangladesh | 30.7 | 29.3 | 28.1 |
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| Latvia | 24.7 | 30.0 | 29.3 |
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| Brazil | 31.5 | 31.6 | 30.6 |
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| Pakistan | 34.1 | 33.7 | 34.1 |
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| Honduras | 41.5 | 43.9 | 43.0 |
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| Nicaragua | 44.9 | 44.9 | 45.2 |
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| Senegal | 45.4 | 46.7 | 46.3 |
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| Paraguay | 53.0 | 50.3 | 48.1 |
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| Congo, Rep. | 57.2 | 52.3 | 51.7 |
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| Sri Lanka | 52.2 | 52.5 | 51.2 |
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| Gabon | 54.7 | 53.8 | 52.9 |
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| Guatemala | 52.7 | 55.0 | 62.0 |
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| Benin | 59.1 | 58.0 | 56.2 |
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| Angola | 61.2 | 59.3 | 56.2 |
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| Cameroon | 66.7 | 64.1 | 62.3 |
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| Zimbabwe | 66.9 | 66.3 | 65.2 |
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| Ghana | 65.1 | 67.0 | 63.8 |
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| Sudan | 69.6 | 68.1 | 68.7 |
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| Haiti | 71.2 | 71.2 | 69.8 |
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| Cambodia | 64.7 | 73.3 | 72.0 |
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| Myanmar | 69.0 | 73.4 | 75.3 |
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| Kenya | 76.2 | 73.9 | 72.8 |
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| Cote d'Ivoire | 74.0 | 75.2 | 75.7 |
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| Eritrea | 80.5 | 77.4 | 78.0 |
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| Zambia | 81.6 | 81.5 | 80.2 |
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| Mozambique | 82.0 | 81.8 | 81.6 |
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| Togo | 83.1 | 82.8 | 82.7 |
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| Nigeria | 81.1 | 84.7 | 83.9 |
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| Nepal | 87.4 | 85.8 | 85.1 |
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| Tanzania | 88.2 | 88.8 | 88.4 |
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| Ethiopia | 93.1 | 93.1 | 93.3 |
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| Congo, Dem. Rep. | 93.4 | 93.7 | 93.4 |
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| South Sudan | ||||||
| Lesotho | ||||||
| Belize | ||||||
| Afghanistan | ||||||
| New Caledonia | ||||||
| Liberia | ||||||
| Greenland | ||||||
| Chad | ||||||
| St. Lucia | ||||||
| Niger | ||||||
| Madagascar | ||||||
| Northern Mariana Islands | ||||||
| Central African Republic | ||||||
| Lao PDR | ||||||
| Sint Maarten (Dutch part) | ||||||
| Bermuda | ||||||
| Somalia | ||||||
| Bhutan | ||||||
| French Polynesia | ||||||
| Macao SAR, China | ||||||
| Liechtenstein | ||||||
| Palau | ||||||
| Kiribati | ||||||
| Maldives | ||||||
| Papua New Guinea | ||||||
| Malawi | ||||||
| Vanuatu | ||||||
| Isle of Man | ||||||
| West Bank and Gaza | ||||||
| Burkina Faso | ||||||
| Bahamas, The | ||||||
| Burundi | ||||||
| Grenada | ||||||
| Monaco | ||||||
| Solomon Islands | ||||||
| Puerto Rico | ||||||
| Micronesia, Fed. Sts. | ||||||
| St. Vincent and the Grenadines | ||||||
| Gambia, The | ||||||
| Suriname | ||||||
| St. Kitts and Nevis | ||||||
| Fiji | ||||||
| St. Martin (French part) | ||||||
| Equatorial Guinea | ||||||
| Marshall Islands | ||||||
| Cape Verde | ||||||
| Swaziland | ||||||
| Turks and Caicos Islands | ||||||
| Faeroe Islands | ||||||
| Uganda | ||||||
| Mali | ||||||
| Aruba | ||||||
| Djibouti | ||||||
| Timor-Leste | ||||||
| Guyana | ||||||
| Tonga | ||||||
| Barbados | ||||||
| Dominica | ||||||
| Rwanda | ||||||
| Curacao | ||||||
| Samoa | ||||||
| Tuvalu | ||||||
| San Marino | ||||||
| Antigua and Barbuda | ||||||
| Sao Tome and Principe | ||||||
| Guinea-Bissau | ||||||
| Comoros | ||||||
| Guinea | ||||||
| Andorra | ||||||
| Guam | ||||||
| American Samoa | ||||||
| Seychelles | ||||||
| Virgin Islands (U.S.) | ||||||
| Sierra Leone | ||||||
| Cayman Islands | ||||||
| Mauritania | ||||||
| Mauritius |