Country name 2010 2011 2012 2013
Luxembourg 0 0 0
Ireland 0 0 0
Estonia 2 0 0
Sudan 1 0 0
Slovenia 0 0 0
Slovak Republic 0 0 0
Guinea 1 0 1
Malta 1 1 1
Belgium 1 1 1
Panama 1 1 1
Cyprus 1 1 1
Netherlands 1 1 1
Ecuador 1 1 1
Finland 1 1 1
Malawi 1 1 1
Greece 1 1 1
United Kingdom 1 1 1
Canada 1 1 1
Spain 1 1 1
Austria 1 1 1
Australia 1 1 1
Tajikistan 1 1 1
Maldives 2 2 1
Congo, Dem. Rep. 1 1 2
Germany 2 2 2
Montenegro 2 1 2
Belarus 2 2 2
Bahamas, The 3 3 2
United States 2 2 2
Sierra Leone 4 2 2
Dominican Republic 3 3 2
France 2 2 2
Sweden 2 2 2
Vietnam 2 1 2
Egypt, Arab Rep. 7 3 2
Honduras 4 3 3
Ukraine 5 4 3
Portugal 2 2 3
Lithuania 3 3 3
Jamaica 4 3 3
Swaziland 3 2 3
Ghana 4 3 3
Mozambique 5 4 3
Antigua and Barbuda 2 3 3
Nicaragua 4 3 3
Seychelles 3 3 3
Belize 3 3 3
Aruba 4 1 3
Pakistan 5 4 3 2
St. Vincent and the Grenadines 3 3 3
Grenada 3 3 3
Bahrain 4 2 3
Georgia 4 4 3
El Salvador 4 3 3
New Zealand 4 3 3
Czech Republic 4 3 3
Italy 3 3 3
St. Lucia 3 3 3
Zambia 4 3 4
Cabo Verde 4 3 4
Norway 4 3 4
Tunisia 4 3 4
Sri Lanka 5 3 4
Kazakhstan 5 4 4
Tanzania 5 4 4
Kyrgyz Republic 5 4 4
Kenya 4 3 4
Kosovo 3 2 4
Bangladesh 4 3 4
Armenia 5 4 4
Burundi 6 4 4
Venezuela, RB 6 5 4
Rwanda 6 6 4
Lesotho 5 4 4
Fiji 4 4 4
Haiti 4 3 4
Guatemala 4 4 4
Guyana 5 4 4
Mauritius 3 4 4
Morocco 7 5 4
Dominica 3 4 4
Djibouti 6 4 4
Lao PDR 5 5 4
Sao Tome and Principe 5 4 4
Hungary 4 4 4
Oman 6 5 4
Jordan 8 7 4
Samoa 7 5 4
South Africa 5 4 4
Paraguay 4 4 4
Chile 4 5 5
Latvia 7 4 5
Mexico 4 4 5
Cameroon 7 4 5
Uganda 5 4 5
Suriname 5 4 5
Macedonia, FYR 5 4 5
Albania 5 4 5
Poland 5 4 5
Moldova 5 4 5
Colombia 6 5 5
Costa Rica 4 4 5
Papua New Guinea 5 7 5
Argentina 8 5 5
Iceland 8 10 5
Bosnia and Herzegovina 6 5 5
Qatar 3 5
Hong Kong SAR, China 6 5 5
Turkey 5 4 5
Mongolia 6 3 5
Indonesia 7 6 6
Singapore 6 5 6
Nigeria 5 4 6
Cambodia 7 6 6
India 8 6 6
Azerbaijan 5 6 6
Gambia, The 7 7 6
Denmark 6 6 6
Korea, Rep. 7 6 6
Timor-Leste 4 3 6
Bulgaria 7 5 6
Croatia 6 6 6
Malaysia 6 7 7
Tonga 5 6 7
Macao SAR, China 16 16 7
Angola 5 6 7
Romania 9 7 7
Afghanistan 9 9 7
Serbia 8 8 7
Thailand 9 8 7
Solomon Islands 5 6 8
Israel 10 9 8
St. Kitts and Nevis 5 8 8
Bhutan 12 7 9 9
Kuwait 8 9 9
Nepal 7 8 10
Botswana 14 11 10
Uruguay 8 8 10
Russian Federation 14 12 12
Philippines 11 12 12
Peru 11 10 12
Brazil 12 12 13
Iraq 13 14 13
Switzerland 9 8 14
Japan 16 15 14
Bolivia 16 15 15
Lebanon 17 17 19
China 22 19 19
Algeria 37 35 34
Saudi Arabia 30 32 35
Libya 39 79 41
Eritrea
Bermuda
Myanmar 11 9
Central African Republic
Puerto Rico
West Bank and Gaza
Monaco
Niger 3
Micronesia, Fed. Sts.
Tuvalu
Mauritania
Vanuatu 5 4
Marshall Islands
Palau
Mali 4 4
Namibia 3 3
San Marino
Chad
Madagascar
Turkmenistan
New Caledonia
Brunei Darussalam
Senegal 4 3
Barbados 4
Liechtenstein
American Samoa
Curacao
Northern Mariana Islands
Syrian Arab Republic 12
Ethiopia
Congo, Rep.
Equatorial Guinea
Liberia 3 2
Cuba
Korea, Dem. Rep.
Cote d'Ivoire 4
Sint Maarten (Dutch part)
Comoros
Kiribati
Togo 4
Isle of Man
Trinidad and Tobago 14 7
Iran, Islamic Rep.
Cayman Islands
Somalia
Turks and Caicos Islands
Guinea-Bissau 6
Burkina Faso 5
South Sudan
United Arab Emirates
Guam
Benin 6 4
Greenland
Uzbekistan
Gabon
Andorra
French Polynesia
Virgin Islands (U.S.)
St. Martin (French part)
Yemen, Rep. 6 4
Faeroe Islands
Zimbabwe

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