Country name 2011 2012 2013 2014
Guinea 1 1
Saudi Arabia 2 2 2
Pakistan 3 3 14
Bermuda 3 3
Japan 3 15 15
Zimbabwe 3
Greenland 3
Aruba 3
Sudan 4
Luxembourg 4 4 4 4
Hong Kong SAR, China 4 4 4 4
Qatar 4 4 4
Bahamas, The 4
Cayman Islands 4 5 2
Egypt, Arab Rep. 5 6 5
Netherlands 6 6 6 6
Macao SAR, China 6 6 5 5
Azerbaijan 6 6 6
Armenia 7 8 7
Jamaica 7 7 6
Namibia 7 5 5
United Kingdom 8 8 8 8
Norway 8 8 7 7
Sweden 8 8 8 7
Greece 8 8 8 8
Australia 8 8 8
Iceland 8 8 8 8
Puerto Rico 8
Jordan 8 9 8 7
Bhutan 9 7 10
Cyprus 9 9 8 7
Canada 9 9 9 8
Paraguay 9 8 8 9
West Bank and Gaza 9 9 10
Spain 9 9 9 9
Ireland 9 9 9 9
Finland 9 9 9 9
Montenegro 9 7 8 8
Israel 9 8 8 4
New Zealand 9 9 9
Denmark 10 10 9 9
Syrian Arab Republic 10
Panama 10 9
Dominican Republic 10 11 9 10
Belgium 10 9 9 8
Barbados 10 10 10
Switzerland 10 10 10 10
Philippines 10 10 10
Chile 10 10 11
Seychelles 10
Venezuela, RB 11
France 11 10 10 10
Senegal 11
Argentina 11 10 9 9
Samoa 11 8
Costa Rica 11 11 11
Ecuador 11 11 12
Kazakhstan 12 12 12
Uruguay 12 10
Brazil 12 13 12
Mongolia 12 12
Cuba 12 13 11
Moldova 12 13 12
Malta 13 11 12 11
Austria 13 13 13 13
Morocco 13 12
South Africa 13 13 13 12
Singapore 14 14 14
Latvia 14 14 14 13
Italy 14 14 14 14
Germany 14 14 14 14
Korea, Rep. 14 14 14
Ukraine 15 15 14 15
Turkey 16 15 16 17
Colombia 16 16 15 14
Mexico 16 15 16
Portugal 17 16 15 16
Serbia 17 17 17
Lithuania 17 16 16 16
Poland 17 16 16 17
Croatia 17 17 16 16
Thailand 17 18 18
Russian Federation 17 17 17 17
Ethiopia 18 17 8
Slovenia 19 19 19 18
El Salvador 19 18 18
Estonia 20 18 18 18
Hungary 20 19 19 19
Honduras 21 21 19
Guatemala 21 16 15
Romania 21 21 21 22
Mauritius 21 20 26 26
Slovak Republic 21 21 19 20
Malaysia 22 20 20
Algeria 24
Bulgaria 24 25 24 23
Czech Republic 24 24 23 24
Sri Lanka 24 26 25 24
Macedonia, FYR 26 25 26 26
Korea, Dem. Rep.
Cambodia
Gabon
Virgin Islands (U.S.)
Kuwait 2
Eritrea
Kyrgyz Republic 11 11
Tunisia
Lao PDR
Central African Republic
Yemen, Rep.
Burundi
Djibouti
Kiribati
Lesotho
Timor-Leste
Liberia
Guam
Libya
Nigeria
Liechtenstein
Cameroon
Iraq
Cabo Verde
Kenya
Fiji
Curacao
Guyana
Isle of Man
Benin
Madagascar 8
Grenada
Malawi 5
Tonga
Dominica
Turkmenistan
Maldives
Equatorial Guinea
Mali
Georgia
Iran, Islamic Rep. 24
Northern Mariana Islands
Marshall Islands
Oman
Mauritania
Palau
Somalia
Papua New Guinea
Indonesia 15
Peru
Brunei Darussalam 11
Faeroe Islands
Sao Tome and Principe 14
Burkina Faso
Bosnia and Herzegovina
Haiti
Bolivia
Rwanda 2
St. Martin (French part)
San Marino
Bangladesh
Botswana
Swaziland
Guinea-Bissau
Antigua and Barbuda
Sierra Leone
French Polynesia
Sint Maarten (Dutch part)
Tajikistan
India 21
Solomon Islands
South Sudan
Belize
St. Kitts and Nevis
Belarus
Micronesia, Fed. Sts.
Cote d'Ivoire
St. Lucia
Monaco
St. Vincent and the Grenadines
Congo, Rep.
Suriname 6
Congo, Dem. Rep.
Bahrain
Comoros
Angola
Mozambique
Tanzania 3
Myanmar
Tuvalu
Togo
Gambia, The 4
Trinidad and Tobago
United States
Ghana 11
Uzbekistan
Turks and Caicos Islands
United Arab Emirates
Uganda
Nepal
China
Andorra
New Caledonia
American Samoa
Chad
Vanuatu
Nicaragua
Vietnam 17 17
Niger
Albania
Afghanistan
Zambia 3
Lebanon

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