1 United States 35 36.8%2 Germany 16 16.8%3 China 13 13.7%4 Canada 4 4.2%5 France 3 3.2%6 Korea, Republic of 3 3.2%7 Ukraine 2 2.1%8 United Kingdom 2 2.1%9 Netherlands 2 2.1%10 Australia 2 2.1%11 Hong Kong 2 2.1%12 India 2 2.1%13 Ireland 1 1.1%14 Israel 1 1.1%15 Brazil 1 1.1%16 Bulgaria 1 1.1%17 Qatar 1 1.1%18 Spain 1 1.1%19 Switzerland 1 1.1%20 Turkey 1 1.1%21 Malaysia 1 1.1%
