US: 559
China: 233
Japan: 228
UK: 88
South Korea: 67
Hong Kong: 58
India: 58
France: 57
Germany: 54
Canada: 51
Taiwan: 47
Switzerland: 41
Australia: 39
Sweden: 27
Italy: 26
Russia: 25
Netherlands: 22
Brazil: 19
Saudi: 15
Turkey: 10
(Forbes)