1 United States 156 42.4%2 China 66 17.9%3 Germany 35 9.5%4 Japan 31 8.4%5 France 18 4.9%8 Ireland 8 2.2%9 Korea, Republic of 5 1.4%10 Canada 5 1.4%11 Hong Kong 5 1.4%12 Senegal 3 0.8%14 Argentina 2 0.5%15 Australia 2 0.5%25 Switzerland 1 0.3%
