Nigeria 1,454,471
United States 261,396
European Union 164,833
South Africa 143,193
United Kingdom 81,287
Viet Nam 32,384
Germany 23,560
Canada 18,444
Italy 13,699
Ireland 13,622
France 10,110
Philippines 9,316
China 8,832
United Arab Emirates 8,667
Ghana 8,155
Romania 7,382
Sweden 6,789
India 6,614
Mexico 5,446
Spain 5,284
Norway 5,056
Netherlands 4,730
Thailand 4,400
Argentina 4,289
Turkey 4,234
Poland 3,793
Malaysia 3,372
Brazil 3,330
Australia 3,181
Indonesia 3,013
Greece 3,011
Austria 2,794
Benin 2,777
Belgium 2,630
Russian Federation 2,579
Cameroon 2,406
Serbia 2,404
Japan 2,364
Finland 2,211
Saudi Arabia 2,152
Qatar 2,042
Estonia 1,919
Switzerland 1,823
Egypt 1,639
Kenya 1,592
Liberia 1,575
Hungary 1,559
Singapore 1,541
Côte d'Ivoire 1,283
Togo 1,256
Korea, Republic of 1,201
Zambia 1,013
Ukraine 1,008
Mozambique 1,008
Czech Republic 887
Israel 887
Portugal 767
Senegal 704
Uganda 685
New Zealand 649
Cambodia 646
Pakistan 611
Sierra Leone 611
Niger 555
Mali 545
Gambia 533
Gabon 529
Kuwait 521
Congo, The Democratic Republic of the 517
Denmark 496
Namibia 487
Hong Kong 476
Libyan Arab Jamahiriya 454
Bulgaria 381
Bangladesh 364
Burkina Faso 351
Croatia 340
Morocco 325
Taiwan, Province of China 324
Angola 313
Colombia 294
Panama 291
Oman 285
Sri Lanka 282
Jamaica 245
Ethiopia 237
Chile 226
Tunisia 216
Iceland 212
Malawi 208
Tanzania, United Republic of 205
Malta 200
Botswana 192
Guinea 188
Luxembourg 178
Cyprus 170
Rwanda 169
Iran, Islamic Republic of 168
Slovenia 154
Dominican Republic 153
Myanmar 149
Trinidad and Tobago 144
Ecuador 140
Albania 140
Slovakia 135
Lao People's Democratic Republic 134
Algeria 131
Iraq 121
Peru 121
Lithuania 118
Somalia 117
Jordan 113
Mauritius 110
Georgia 110
Sudan 109
Lebanon 106
Zimbabwe 105
Fiji 97
Kazakhstan 96
Puerto Rico 94
Lesotho 88
Venezuela, Bolivarian Republic of 88
Sao Tome and Principe 77
Latvia 72
Cape Verde 71
Costa Rica 63
Swaziland 63
Equatorial Guinea 63
Bolivia, Plurinational State of 60
Moldova, Republic of 59
Antigua and Barbuda 58
Macao 57
Madagascar 55
Grenada 55
Seychelles 55
Guatemala 55
Azerbaijan 54
Macedonia, The Former Yugoslav Republic of 54
Belarus 54
Bosnia and Herzegovina 50
Bahrain 49
Chad 48
Guyana 47
Nepal 46
Congo 44
Guinea-Bissau 40
Dominica 37
Saint Kitts and Nevis 37
Suriname 37
Brunei Darussalam 37
Virgin Islands, British 35
Mongolia 35
Mauritania 34
Uruguay 33
Barbados 31
Belize 27
El Salvador 27
Armenia 24
Palestinian Territory, Occupied 24
Honduras 20
Paraguay 20
Yemen 19
Saint Vincent and the Grenadines 18
Samoa 18
Nicaragua 16
Burundi 16
Kiribati 16
Maldives 16
Bahamas 16
Saint Lucia 16
Kyrgyzstan 15
Tonga 15
Papua New Guinea 14
Cayman Islands 14
Syrian Arab Republic 13
Marshall Islands 13
Haiti 13
Afghanistan 12
Guam 11
Jersey 11
Solomon Islands 11
Isle of Man 10
Bhutan 10
French Polynesia 9
Central African Republic 7
Virgin Islands, U.S. 7
Monaco 6
Micronesia, Federated States of 6
Uzbekistan 6
New Caledonia 6
Vanuatu 6
Cuba 5
Réunion 5
Aruba 5
Gibraltar 4
Faroe Islands 4
Turks and Caicos Islands 4
Timor-Leste 4
Montenegro 3
Tajikistan 3
Bermuda 3
United States Minor Outlying Islands 3
American Samoa 3
Djibouti 2
Guadeloupe 2
Cook Islands 2
Comoros 2
Netherlands Antilles 2
Martinique 2
Northern Mariana Islands 2
Korea, Democratic People's Republic of 1
French Guiana 1
Åland Islands 1
Anguilla 1
Greenland 1
Holy See (Vatican City State) 1