1 United States 23 37.1%2 Germany 8 12.9%3 Ukraine 6 9.7%4 China 5 8.1%5 France 5 8.1%7 Netherlands 3 4.8%8 Canada 2 3.2%9 Croatia 1 1.6%10 India 1 1.6%11 Ireland 1 1.6%12 Italy 1 1.6%13 Norway 1 1.6%14 Poland 1 1.6%15 Spain 1 1.6%
