 1 United States 72 58.52 Germany 12 9.83 China 10 8.14 Republic of Korea 5 4.16 Egypt 3 2.47 Serbia 3 2.48 Philippines 2 1.69 France 2 1.610 Kazakhstan 2 1.611 Indonesia 2 1.612 Iran 1 0.813 Italy 1 0.814 Netherlands 1 0.816 Ukraine 1 0.817 United Kingdom 1 0.8 