1 United States 74 35.4%2 Germany 64 30.6%3 China 23 11%4 France 19 9.1%5 Sweden 7 3.3%6 Canada 6 2.9%7 Ukraine 4 1.9%8 Ireland 4 1.9%9 United Kingdom 3 1.4%10 Viet Nam 1 0.5%12 Korea, Republic of 1 0.5%13 Netherlands 1 0.5%14 Hong Kong 1 0.5%32 63 30 32 26 23 4 21039 33 36 22 21 26 23 22 29 29 21 23 32421 22 25 27 30 19 1 1 1 28 17510 16 19 14 10 69
