2021 | 总访问次数
排名 | 国家/地区 | 数量 | 占比 |
1 | China | 10 | 43.5% |
2 | United States | 7 | 30.4% |
3 | Iran, Islamic Republic of | 4 | 17.4% |
4 | Netherlands | 2 | 8.7% |
排名 | 国家/地区 | 数量 | 占比 |
1 | China | 10 | 43.5% |
2 | United States | 7 | 30.4% |
3 | Iran, Islamic Republic of | 4 | 17.4% |
4 | Netherlands | 2 | 8.7% |