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Rank | Countries/Territories | Count | Percent |
1 | United States | 153 | 35.9% |
2 | China | 145 | 34% |
3 | Germany | 61 | 14.3% |
4 | Japan | 14 | 3.3% |
5 | Singapore | 9 | 2.1% |
6 | Russia | 7 | 1.6% |
7 | France | 6 | 1.4% |
8 | Cyprus | 4 | 0.9% |
9 | Korea, Republic of | 4 | 0.9% |
10 | Ghana | 3 | 0.7% |
11 | Hong Kong | 3 | 0.7% |
12 | Iceland | 2 | 0.5% |
13 | Mongolia | 2 | 0.5% |
14 | Netherlands | 2 | 0.5% |
15 | Norway | 2 | 0.5% |
16 | Sweden | 2 | 0.5% |
17 | United Kingdom | 2 | 0.5% |
18 | South Africa | 1 | 0.2% |
19 | Luxembourg | 1 | 0.2% |
20 | Iran, Islamic Republic of | 1 | 0.2% |
21 | Ireland | 1 | 0.2% |
22 | Australia | 1 | 0.2% |
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