Country name 2011
Afghanistan 44
Albania 22
Algeria 31
American Samoa
Andorra 24
Angola 47
Antigua and Barbuda 29
Argentina 28
Armenia 28
Aruba
Australia 25
Austria 25
Azerbaijan 31
Bahamas, The 29
Bahrain 34
Bangladesh 48
Barbados 28
Belarus 25
Belgium 24
Belize 27
Benin 63
Bermuda
Bhutan 46
Bolivia 38
Bosnia and Herzegovina 27
Botswana 32
Brazil 32
Brunei Darussalam 28
Bulgaria 26
Burkina Faso 58
Burundi 31
Cabo Verde 42
Cambodia 51
Cameroon 50
Canada 23
Cayman Islands
Central African Republic 51
Chad 51
Chile 25
China 22
Colombia 30
Comoros 35
Congo, Dem. Rep. 49
Congo, Rep. 59
Costa Rica 26
Cote d'Ivoire 57
Croatia 26
Cuba 28
Curacao
Cyprus 31
Czech Republic 24
Denmark 24
Djibouti 32
Dominica 32
Dominican Republic 32
Ecuador 29
Egypt, Arab Rep. 30
El Salvador 28
Equatorial Guinea 53
Eritrea 36
Estonia 26
Ethiopia 23
Faeroe Islands
Fiji 35
Finland 24
France 25
French Polynesia
Gabon 60
Gambia, The 56
Georgia 25
Germany 24
Ghana 62
Greece 27
Greenland
Grenada 31
Guam
Guatemala 30
Guinea 61
Guinea-Bissau 49
Guyana 30
Haiti 48
Honduras 22
Hong Kong SAR, China
Hungary 25
Iceland 23
India 54
Indonesia 30
Iran, Islamic Rep. 26
Iraq 31
Ireland 24
Isle of Man
Israel 24
Italy 26
Jamaica 30
Japan 31
Jordan 27
Kazakhstan 27
Kenya 36
Kiribati 29
Korea, Dem. Rep. 27
Korea, Rep. 25
Kuwait 25
Kyrgyz Republic 30
Lao PDR 37
Latvia 25
Lebanon 27
Lesotho 31
Liberia 53
Libya 28
Liechtenstein
Lithuania 25
Luxembourg 24
Macao SAR, China
Macedonia, FYR 26
Madagascar 33
Malawi 37
Malaysia 27
Maldives 39
Mali 61
Malta 24
Marshall Islands 28
Mauritania 44
Mauritius 30
Mexico 21
Micronesia, Fed. Sts. 27
Moldova 28
Monaco
Mongolia 25
Montenegro 26
Morocco 32
Mozambique 48
Myanmar 33
Namibia 34
Nepal 44
Netherlands 25
New Caledonia
New Zealand 23
Nicaragua 20
Niger 57
Nigeria 58
Northern Mariana Islands
Norway 24
Oman 34
Pakistan 51
Palau
Panama 28
Papua New Guinea 37
Paraguay 31
Peru 23
Philippines 32
Poland 25
Portugal 26
Puerto Rico
Qatar 28
Romania 26
Russian Federation 23
Rwanda 19
Samoa 26
San Marino
Sao Tome and Principe 47
Saudi Arabia 40
Senegal 64
Serbia 27
Seychelles 26
Sierra Leone 45
Singapore 29
Sint Maarten (Dutch part)
Slovak Republic 25
Slovenia 25
Solomon Islands 33
Somalia 46
South Africa 30
South Sudan
Spain 25
Sri Lanka 26
St. Kitts and Nevis
St. Lucia 32
St. Martin (French part)
St. Vincent and the Grenadines 30
Sudan 34
Suriname 31
Swaziland 31
Sweden 24
Switzerland 26
Syrian Arab Republic 30
Tajikistan 28
Tanzania 51
Thailand 30
Timor-Leste 24
Togo 58
Tonga 26
Trinidad and Tobago 30
Tunisia 29
Turkey 28
Turkmenistan 29
Turks and Caicos Islands
Tuvalu
Uganda 34
Ukraine 25
United Arab Emirates 26
United Kingdom 23
United States 17
Uruguay 29
Uzbekistan 35
Vanuatu 27
Venezuela, RB 27
Vietnam 24
Virgin Islands (U.S.)
West Bank and Gaza
Yemen, Rep. 36
Zambia 36
Zimbabwe 34

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