| Country or Area | Value | Year(s) | Value Footnotes |
|---|---|---|---|
| Albania | 24.3 | 2006 | |
| Armenia | 9 | 2005 | |
| Australia | 30.8 | 2006 | |
| Austria | 25.8 | 2006 | |
| Azerbaijan | 4.7 | 2006 | |
| Bangladesh | 3.5 | 2004 | |
| Belarus | 19.5 | 2006 | |
| Benin | 3.6 | 2006 | |
| Bolivia (Plurinational State of) | 14.6 | 2003 | |
| Botswana | 7.7 | 2001 | |
| Brazil | 41.3 | 2005 | |
| Bulgaria | 23.6 | 2006 | |
| Burkina Faso | 0.7 | 2003 | |
| Côte d'Ivoire | 6.4 | 2005 | |
| Cambodia | 1.8 | 2005 | |
| Cameroon | 2 | 2004 | |
| Canada | 26.3 | 2005 | Note : Data from years 2005-2006 |
| Cape Verde | 10.7 | 2005 | |
| Chad | 0.4 | 2004 | |
| Chile | 30.7 | 2002 | |
| China | 40.5 | 2000 | |
| Colombia | 26.7 | 2005 | |
| Congo | 3.2 | 2005 | |
| Croatia | 16.2 | 2006 | |
| Cuba | 28.5 | 2002 | |
| Czech Republic | 18.4 | 2006 | |
| Democratic Republic of the Congo | 4 | 2007 | |
| Denmark | 20.3 | 2004 | |
| Djibouti | 10 | 2006 | |
| Dominican Republic | 41.9 | 2007 | |
| Ecuador | 25.8 | 2004 | |
| Egypt | 27.6 | 2008 | |
| El Salvador | 22 | 2002 | Note : Data from years 2002-2003 |
| Eritrea | 2.7 | 2002 | |
| Estonia | 19 | 2006 | |
| Ethiopia | 1 | 2005 | |
| Fiji | 7.1 | 2000 | |
| Finland | 16.1 | 2006 | |
| France | 18.8 | 2003 | |
| Gabon | 5.6 | 2000 | |
| Georgia | 13 | 2005 | |
| Germany | 27.8 | 2006 | |
| Ghana | 3.7 | 2003 | |
| Guatemala | 11.4 | 2002 | |
| Guinea | 1.7 | 2005 | |
| Haiti | 3 | 2005 | Note : Data from years 2005-2006 |
| Honduras | 13 | 2005 | Note : Data from years 2005-2006 |
| Hungary | 28 | 2006 | |
| Iceland | 15.6 | 2005 | |
| India | 8.5 | 2005 | Note : Data from years 2005-2006 |
| Indonesia | 4.1 | 2002 | Note : Data from years 2002-2003 |
| Ireland | 25.4 | 2004 | |
| Israel | 19.1 | 2006 | |
| Italy | 37.4 | 2004 | |
| Jordan | 18.5 | 2007 | |
| Kazakhstan | 10 | 2006 | |
| Kenya | 4 | 2003 | |
| Kuwait | 13.9 | 2006 | |
| Kyrgyzstan | 5.1 | 2006 | |
| Latvia | 21.1 | 2006 | |
| Lesotho | 5.1 | 2004 | |
| Liberia | 3.5 | 2007 | |
| Lithuania | 19.2 | 2006 | |
| Luxembourg | 24 | 2004 | |
| Madagascar | 1 | 2003 | Note : Data from years 2003-2004 |
| Malawi | 3.1 | 2004 | |
| Mali | 1.6 | 2006 | |
| Malta | 34.3 | 2006 | |
| Mauritania | 3.2 | 2000 | Note : Data from years 2000-2001 |
| Mauritius | 37 | 2006 | |
| Mexico | 36.1 | 2005 | |
| Montenegro | 11.4 | 2006 | |
| Morocco | 5.4 | 2003 | Note : Data from years 2003-2004 |
| Mozambique | 1.9 | 2003 | |
| Namibia | 12.7 | 2006 | Note : Data from years 2006-2007 |
| Nepal | 2.7 | 2006 | |
| Netherlands | 13.7 | 2004 | |
| New Zealand | 23.5 | 2004 | |
| Nicaragua | 19.6 | 2006 | Note : Data from years 2006-2007 |
| Niger | 1 | 2006 | |
| Nigeria | 1.7 | 2003 | |
| Norway | 16.6 | 2006 | |
| Pakistan | 7.3 | 2006 | Note : Data from years 2006-2007 |
| Papua New Guinea | 4.7 | 2002 | |
| Paraguay | 26.9 | 2004 | |
| Peru | 15.8 | 2004 | |
| Philippines | 7.3 | 2003 | |
| Portugal | 34 | 2005 | |
| Republic of Korea | 37.7 | 2000 | |
| Republic of Moldova | 8.5 | 2005 | |
| Romania | 21.4 | 2005 | |
| Russian Federation | 17.2 | 2005 | |
| Rwanda | 2.9 | 2005 | |
| Saudi Arabia | 11.6 | 2001 | |
| Senegal | 3.3 | 2005 | |
| Serbia | 14.7 | 2006 | |
| Slovakia | 20 | 2005 | |
| Slovenia | 16.3 | 2006 | |
| South Africa | 20.6 | 2003 | |
| Spain | 25 | 2005 | |
| Sudan | 4.5 | 2006 | |
| Swaziland | 7.9 | 2006 | Note : Data from years 2006-2007 |
| Sweden | 16.5 | 2004 | |
| Switzerland | 28.9 | 2005 | |
| Syrian Arab Republic | 14.8 | 2000 | |
| Tajikistan | 2.1 | 2006 | |
| Thailand | 17.4 | 2001 | Note : Data from public sector only |
| The former Yugoslav Republic of Macedonia | 11.4 | 2003 | |
| Tunisia | 20.5 | 2006 | |
| Turkey | 21.2 | 2003 | |
| Turkmenistan | 3.4 | 2006 | |
| Uganda | 3.1 | 2006 | |
| Ukraine | 10.4 | 2007 | |
| United Arab Emirates | 15.2 | 2003 | |
| United Kingdom | 22 | 2004 | |
| United Republic of Tanzania | 3.2 | 2004 | Note : Data from years 2004-2005 |
| United States of America | 30.2 | 2005 | |
| Uruguay | 23.8 | 2000 | |
| Uzbekistan | 4.9 | 2005 | |
| Venezuela (Bolivarian Republic of) | 25.1 | 2002 | |
| Viet Nam | 9.9 | 2002 | |
| Zambia | 2.1 | 2001 | Note : Data from years 2001-2002 |
| Zimbabwe | 4.8 | 2005 | Note : Data from years 2005-2006 |