| Country | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Argentina | $62 | $53 | | | | | |
| Australia | $1,079 | $4,436 | | | | | |
| Austria | $72,937 | $147,296 | | | | | |
| Azerbaijan | | $44 | | | | | |
| Bangladesh | $4,395 | $16,703 | $524 | | | | |
| Belgium | $267,348 | $325,600 | | | | | |
| Benin | | | | | | $13,710 | |
| Bhutan | $82 | | | | | | |
| Bosnia and Herzegovina | | $55 | | | | | |
| Botswana | | | $78 | | $97 | $303 | |
| Brazil | $49,360 | $27,034 | | | | | |
| Brunei | | $175 | | | | | |
| Bulgaria | $144 | | | | | | |
| Burundi | | | | | $25,255 | | |
| Cameroon | | | | $2,705 | | | |
| Canada | $33,568 | $24,245 | | | | | |
| Cape Verde | $380 | $819 | | | | | |
| Chile | $61 | $443 | | | | | |
| China | $102,124 | $46,806 | | | | | |
| Colombia | $2,636 | $2,864 | | | | | |
| Cote d'Ivoire | $34 | | | | | | |
| Cuba | $364 | | | | | | |
| Czech Republic | | $33 | | | | | |
| Denmark | | $11 | | | | | |
| Dominica | | | $14 | | | | |
| Dominican Republic | | $12,828 | | | | | |
| Ecuador | $38 | | | | | | |
| Egypt | | $71,087 | | | | | |
| Estonia | $33 | | | | | | |
| Ethiopia | | | $431 | | | | |
| Finland | $201 | | | | | | |
| France | $7,466 | $5,022 | | | | | |
| Germany | $2,000 | $6,000 | | | | | |
| Ghana | $10 | $4,921 | | $73 | | | |
| Greece | | $21 | | | | | |
| Hong Kong | $123 | $49 | | | | | |
| India | $16 | $9,191 | | | | | |
| Indonesia | $6,587 | $4,377 | | | | | |
| Ireland | | $4,125 | | | | | |
| Italy | $2,670 | $2,564 | | | | | |
| Jamaica | $83 | $113 | | | | | |
| Kazakhstan | $24,348 | $18,000 | | | | | |
| Kenya | $1,199 | $748 | $4,902 | | | | |
| Korea, South | $2,679 | $2,078 | | | | | |
| Kuwait | | | $2,516 | | | | |
| Lebanon | | $29 | | | | | |
| Malawi | $1,479 | $2,237 | $3,625 | | | | |
| Malaysia | $1,571 | $15,930 | | | | | |
| Maldives | $6 | | $34 | | | | |
| Mauritius | $186 | | | | | | |
| Mexico | $45,352 | $2,463 | $2,325 | | | | |
| Moldova | $12 | | | | | | |
| Mongolia | $2,100 | $444 | | | | | |
| Morocco | $5,228 | $60 | $16 | | $4,488 | $283 | |
| Namibia | $218 | | | | | | |
| Netherlands | $3,730 | $6,281 | | | | | |
| Netherlands Antilles | | | | $85 | | | |
| New Zealand | $209 | $36 | | | | | |
| Oman | $1,376 | | | | | | |
| Pakistan | | | $228 | | | | |
| Peru | $9,869 | $7,755 | $1,005 | | | | |
| Philippines | | $5,392 | $5,081 | $115,954 | $44,276 | | |
| Poland | $9,092 | $366 | | | | | |
| Qatar | | | $5,913 | | | | |
| Romania | $362 | $326 | | | | | |
| Russia | | $76 | | | | | |
| Rwanda | | | | $49 | | | |
| Saint Lucia | | $30 | | | | | |
| Saudi Arabia | $83,430 | $99,320 | | | | | |
| Serbia | | $73 | | | | | |
| Seychelles | | $154 | | | | | |
| Singapore | $660 | $146 | | | | | |
| South Africa | $70 | $225 | | | | | |
| Spain | $623 | $1,053 | | | | | |
| Sri Lanka | $2,072 | $1,666 | $327 | | | | |
| Suriname | $1,345 | | | | | | |
| Sweden | $6,162 | $7,336 | | | | | |
| Switzerland | $11,052 | $9,866 | | | | | |
| Tanzania | $143 | $268 | $105,733 | | | | |
| Thailand | $56 | $394 | | | | | |
| Trinidad and Tobago | | $3,711 | | | | | |
| Tunisia | | $712 | | | | | |
| Uganda | $18 | | | | | | |
| United Arab Emirates | $1,663 | | | | | | |
| United Kingdom | $14,883 | $51,348 | | | | | |
| United States | | $6,549 | | | | | |
| Uruguay | $25 | $41 | | | | | |
| Vanuatu | | $67 | | | | | |
| Venezuela | | $301 | $1,178 | | | $97 | $133 |
| Vietnam | | $230 | $840 | | | | |
| Zambia | | $2,683 | | | | | |
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