2021 | 总访问次数
排名 | 国家/地区 | 数量 | 占比 |
1 | China | 57 | 48.7% |
2 | United States | 23 | 19.7% |
3 | France | 12 | 10.3% |
4 | Germany | 10 | 8.5% |
5 | Netherlands | 8 | 6.8% |
6 | Iran, Islamic Republic of | 3 | 2.6% |
7 | Korea, Republic of | 2 | 1.7% |
8 | India | 2 | 1.7% |