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Rank | Countries/Territories | Count | Percent |
1 | United States | 68 | 50.7% |
2 | China | 23 | 17.2% |
3 | Canada | 17 | 12.7% |
4 | Germany | 8 | 6% |
5 | Russia | 5 | 3.7% |
6 | United Kingdom | 5 | 3.7% |
7 | France | 4 | 3% |
8 | Iran, Islamic Republic of | 2 | 1.5% |
9 | Ireland | 2 | 1.5% |
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