United States 240
India 162
Pakistan 113
Spain 97
Russian Federation 82
Romania 39
Italy 29
United Kingdom 25
Bangladesh 24
Taiwan, Province of China 20
Canada 19
China 14
Singapore 12
Bulgaria 9
Greece 9
Hungary 8
European Union 7
Lithuania 7
United Arab Emirates 6
France 5
Korea, Republic of 5
South Africa 4
Egypt 4
Indonesia 4
Brazil 3
Philippines 3
Sweden 3
Australia 3
Hong Kong 3
Norway 2
Japan 2
Malaysia 2
Saudi Arabia 2
Mexico 2
New Zealand 2
Chile 2
Colombia 2
Switzerland 2
Poland 1
Peru 1
Portugal 1
Turkey 1
Macedonia, The Former Yugoslav Republic of 1
Netherlands 1
Tunisia 1
Nigeria 1
Nepal 1
Ukraine 1
Ireland 1
Czech Republic 1
Belgium 1
Serbia 1
Haiti 1