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排名 | 国家/地区 | 数量 | 占比 |
1 | United States | 79 | 37.3% |
2 | China | 68 | 32.1% |
3 | Canada | 29 | 13.7% |
4 | Singapore | 8 | 3.8% |
5 | Japan | 8 | 3.8% |
6 | Netherlands | 7 | 3.3% |
7 | Russia | 3 | 1.4% |
8 | Argentina | 3 | 1.4% |
9 | Australia | 3 | 1.4% |
10 | Germany | 2 | 0.9% |
11 | Mongolia | 1 | 0.5% |
12 | South Africa | 1 | 0.5% |
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