| Country (%) |
| Azerbaijan | 13.4 in 2005 | WB |
| Ukraine | 10.1 in 2016 | WB |
| Kazakhstan | 10 in 2015 | WB |
| Kyrgyzstan | 10 in 2016 | WB |
| Republic of Moldova | 10 in 2016 | WB |
| Czech Republic | 9.7 in 2015 | WB |
| Iceland | 9.7 in 2014 | WB |
| Belarus | 9.6 in 2016 | WB |
| Slovenia | 9.6 in 2015 | WB |
| Algeria | 9.4 in 2011 | WB |
| Denmark | 9.4 in 2015 | WB |
| Finland | 9.4 in 2015 | WB |
| Timor-Leste | 9.4 in 2014 | WB |
| Pakistan | 9.2 in 2013 | WB |
| Egypt | 9.1 in 2015 | WB |
| Norway | 9 in 2015 | WB |
| Serbia | 9 in 2015 | WB |
| Albania | 8.9 in 2012 | WB |
| Iraq | 8.8 in 2012 | WB |
| Netherlands | 8.7 in 2015 | WB |
| Bangladesh | 8.6 in 2016 | WB |
| Belgium | 8.6 in 2015 | WB |
| Malta | 8.6 in 2014 | WB |
| Montenegro | 8.5 in 2014 | WB |
| Romania | 8.5 in 2016 | WB |
| Slovakia | 8.5 in 2015 | WB |
| Sao Tome and Principe | 8.4 in 2010 | WB |
| Burkina Faso | 8.3 in 2014 | WB |
| India | 8.3 in 2011 | WB |
| Nepal | 8.3 in 2010 | WB |
| Jordan | 8.2 in 2010 | WB |
| Sweden | 8.2 in 2015 | WB |
| Poland | 8.1 in 2015 | WB |
| Mali | 8 in 2009 | WB |
| Mongolia | 8 in 2016 | WB |
| Armenia | 7.9 in 2016 | WB |
| Austria | 7.9 in 2015 | WB |
| Cyprus | 7.9 in 2015 | WB |
| France | 7.9 in 2015 | WB |
| Ireland | 7.9 in 2014 | WB |
| Lebanon | 7.9 in 2011 | WB |
| Luxembourg | 7.9 in 2014 | WB |
| Sierra Leone | 7.9 in 2011 | WB |
| Germany | 7.8 in 2015 | WB |
| Hungary | 7.8 in 2015 | WB |
| Niger | 7.8 in 2014 | WB |
| Switzerland | 7.8 in 2014 | WB |
| Bosnia and Herzegovina | 7.7 in 2015 | WB |
| Liberia | 7.7 in 2014 | WB |
| Palestine | 7.7 in 2011 | WB |
| Fiji | 7.6 in 2013 | WB |
| Guinea | 7.6 in 2012 | WB |
| Lao People’s Democratic Republic | 7.6 in 2012 | WB |
| Syrian Arab Republic | 7.6 in 2004 | WB |
| Estonia | 7.5 in 2015 | WB |
| Mauritania | 7.5 in 2014 | WB |
| United Kingdom | 7.5 in 2015 | WB |
| Gambia | 7.4 in 2015 | WB |
| Japan | 7.4 in 2008 | WB |
| Mauritius | 7.4 in 2012 | WB |
| Tajikistan | 7.4 in 2015 | WB |
| United Republic of Tanzania | 7.4 in 2011 | WB |
| Uzbekistan | 7.4 in 2003 | WB |
| Australia | 7.3 in 2010 | WB |
| Croatia | 7.3 in 2015 | WB |
| Myanmar | 7.3 in 2015 | WB |
| Republic of Korea | 7.3 in 2012 | WB |
| Yemen | 7.3 in 2014 | WB |
| Latvia | 7.1 in 2015 | WB |
| Viet Nam | 7.1 in 2014 | WB |
| Solomon Islands | 7 in 2013 | WB |
| Sri Lanka | 7 in 2016 | WB |
| Burundi | 6.9 in 2013 | WB |
| Russian Federation | 6.9 in 2015 | WB |
| Thailand | 6.9 in 2013 | WB |
| Sudan | 6.8 in 2009 | WB |
| Bhutan | 6.7 in 2012 | WB |
| Georgia | 6.7 in 2016 | WB |
| Portugal | 6.7 in 2015 | WB |
| Tonga | 6.7 in 2009 | WB |
| Tunisia | 6.7 in 2010 | WB |
| Vanuatu | 6.7 in 2010 | WB |
| Canada | 6.6 in 2013 | WB |
| Ethiopia | 6.6 in 2015 | WB |
| Kiribati | 6.6 in 2006 | WB |
| Philippines | 6.6 in 2015 | WB |
| Tuvalu | 6.6 in 2010 | WB |
| Morocco | 6.5 in 2006 | WB |
| Maldives | 6.4 in 2009 | WB |
| Samoa | 6.4 in 2008 | WB |
| Uganda | 6.4 in 2012 | WB |
| Iran | 6.3 in 2014 | WB |
| Italy | 6.2 in 2014 | WB |
| Lithuania | 6.1 in 2015 | WB |
| Senegal | 6.1 in 2011 | WB |
| Turkmenistan | 6.1 in 1998 | WB |
| Bulgaria | 6 in 2014 | WB |
| El Salvador | 5.9 in 2016 | WB |
| Greece | 5.9 in 2015 | WB |
| Gabon | 5.8 in 2005 | WB |
| Spain | 5.8 in 2015 | WB |
| Uruguay | 5.8 in 2016 | WB |
| Zimbabwe | 5.8 in 2011 | WB |
| Côte d'Ivoire | 5.7 in 2015 | WB |
| Madagascar | 5.7 in 2012 | WB |
| Mexico | 5.7 in 2016 | WB |
| Turkey | 5.7 in 2016 | WB |
| Macedonia | 5.6 in 2014 | WB |
| Democratic Republic of the Congo | 5.5 in 2012 | WB |
| Haiti | 5.5 in 2012 | WB |
| Malawi | 5.5 in 2010 | WB |
| Micronesia (Federated States of) | 5.5 in 2013 | WB |
| Trinidad and Tobago | 5.5 in 1992 | WB |
| Angola | 5.4 in 2008 | WB |
| Ghana | 5.4 in 2012 | WB |
| Nigeria | 5.4 in 2009 | WB |
| Seychelles | 5.4 in 2013 | WB |
| Jamaica | 5.3 in 2004 | WB |
| Rwanda | 5.2 in 2013 | WB |
| Saint Lucia | 5.2 in 1995 | WB |
| Nicaragua | 5.1 in 2014 | WB |
| Papua New Guinea | 5.1 in 2009 | WB |
| Argentina | 5 in 2016 | WB |
| Cabo Verde | 5 in 2007 | WB |
| Togo | 5 in 2015 | WB |
| United States of America | 5 in 2016 | WB |
| Chad | 4.9 in 2011 | WB |
| Djibouti | 4.9 in 2013 | WB |
| Dominican Republic | 4.9 in 2016 | WB |
| Chile | 4.8 in 2015 | WB |
| Ecuador | 4.7 in 2016 | WB |
| Israel | 4.7 in 2012 | WB |
| Kenya | 4.7 in 2005 | WB |
| Malaysia | 4.6 in 2009 | WB |
| Peru | 4.6 in 2016 | WB |
| Cameroon | 4.5 in 2014 | WB |
| Comoros | 4.5 in 2013 | WB |
| Guatemala | 4.5 in 2014 | WB |
| Guinea Bissau | 4.5 in 2010 | WB |
| Guyana | 4.5 in 1998 | WB |
| Paraguay | 4.5 in 2016 | WB |
| Congo | 4.2 in 2011 | WB |
| Costa Rica | 4.2 in 2016 | WB |
| Mozambique | 4.2 in 2014 | WB |
| Eswatini | 4 in 2009 | WB |
| Bolivia | 3.9 in 2016 | WB |
| Colombia | 3.9 in 2016 | WB |
| South Sudan | 3.9 in 2009 | WB |
| Brazil | 3.6 in 2015 | WB |
| Central African Republic | 3.3 in 2008 | WB |
| Namibia | 3.3 in 2009 | WB |
| Panama | 3.3 in 2016 | WB |
| Belize | 3.2 in 1999 | WB |
| Benin | 3.2 in 2015 | WB |
| Honduras | 3.2 in 2016 | WB |
| Venezuela (Bolivarian Republic of) | 3.2 in 2006 | WB |
| Zambia | 2.9 in 2015 | WB |
| Botswana | 2.8 in 2009 | WB |
| Lesotho | 2.8 in 2010 | WB |
| South Africa | 2.4 in 2014 | WB |
| Suriname | 1 in 1999 | WB |
| China | 0 in 2014 | WB |
| Indonesia | 0 in 2016 | WB |
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