Country name 2010 2011 2012 2013
Ethiopia 3
Senegal 6
Nepal 9
Zimbabwe 12
Mozambique 16
Uganda 19
Peru 19 22 22
Cameroon 30
Qatar
Libya
Aruba
Tajikistan 2
Australia
Micronesia, Fed. Sts.
Austria
Solomon Islands
Azerbaijan
Uzbekistan
Bahamas, The
Malaysia
Bahrain
Armenia 9
Bangladesh
Angola
Barbados
St. Martin (French part)
Belarus
Turkey
Belgium
American Samoa
Belize
Macao SAR, China
Benin 19
Marshall Islands
Bermuda
Montenegro
Bhutan
Antigua and Barbuda
Bolivia
Samoa
Bosnia and Herzegovina
Singapore
Botswana
Spain
Brazil
Swaziland
Brunei Darussalam
Togo
Bulgaria
Andorra
Burkina Faso 16
Virgin Islands (U.S.)
Burundi 3
Lesotho
Cabo Verde
Lithuania
Cambodia 4
Madagascar
Argentina
Mali 4
New Zealand
Albania
Northern Mariana Islands
Monaco
Palau
Algeria
Canada
Netherlands
Cayman Islands
Niger 1
Central African Republic
Oman
Chad
Papua New Guinea
Chile
Portugal
China
Russian Federation
Colombia 31
Sao Tome and Principe
Comoros
Seychelles
Congo, Dem. Rep.
Slovak Republic
Congo, Rep.
South Africa
Costa Rica
St. Kitts and Nevis
Cote d'Ivoire 23
Sudan
Croatia
Switzerland
Cuba
Thailand
Curacao
Trinidad and Tobago
United Arab Emirates
Turks and Caicos Islands
Cyprus
Czech Republic
United States
Denmark
Venezuela, RB
Djibouti
Yemen, Rep.
Dominica
Afghanistan
Dominican Republic
Liberia
Ecuador
Liechtenstein
Egypt, Arab Rep.
Luxembourg
El Salvador
Macedonia, FYR
Equatorial Guinea
Malawi 13
Eritrea
Maldives
Estonia
Malta
Mauritius
Mauritania
Faeroe Islands
Mexico
Fiji
Moldova
Finland
Mongolia
Myanmar
Morocco
France
French Polynesia
Namibia
Gabon 49
Gambia, The
New Caledonia
Georgia
Nicaragua
Germany
Nigeria 12
Ghana
Norway
Greece
Pakistan
Greenland
Panama
Philippines
Paraguay
Grenada
Guam
Poland
Guatemala
Puerto Rico
Guinea 11
Romania
Guinea-Bissau
Rwanda 13
Guyana
San Marino
Haiti 37
Saudi Arabia
Honduras 14
Serbia
Hong Kong SAR, China
Sierra Leone
Hungary
Sint Maarten (Dutch part)
Iceland
Slovenia
India
Somalia
Indonesia
South Sudan
Iran, Islamic Rep.
Sri Lanka
Iraq
St. Lucia
Ireland
St. Vincent and the Grenadines
Isle of Man
Suriname
Israel
Sweden
Italy
Syrian Arab Republic
Jamaica
Tanzania 20 25
Japan
Timor-Leste 0
Jordan
Tonga
Kazakhstan
Tunisia
Kenya
Turkmenistan
Kiribati
Tuvalu
Korea, Dem. Rep.
Ukraine
Korea, Rep.
United Kingdom
Kosovo
Uruguay
Kuwait
Vanuatu
Kyrgyz Republic 9
Vietnam
Lao PDR
West Bank and Gaza
Latvia
Zambia
Lebanon

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