 1 United States 156 42.42 China 66 17.93 Germany 35 9.54 Japan 31 8.45 France 18 4.98 Ireland 8 2.29 Korea, Republic of 5 1.410 Canada 5 1.411 Hong Kong 5 1.412 Senegal 3 0.814 Argentina 2 0.515 Australia 2 0.525 Switzerland 1 0.3 