United States 528
Italy 213
Russian Federation 20
Germany 15
France 12
India 8
Canada 8
European Union 5
United Kingdom 4
Finland 4
Switzerland 4
Korea, Republic of 3
Ireland 2
Argentina 2
Chile 2
Portugal 2
Sweden 2
Belgium 2
Japan 1
Norway 1
Spain 1
Peru 1
Mexico 1
Ecuador 1
Israel 1