2021 | 总访问次数
排名 | 国家/地区 | 数量 | 占比 |
1 | China | 62 | 39.7% |
2 | United States | 62 | 39.7% |
3 | Netherlands | 15 | 9.6% |
4 | France | 5 | 3.2% |
5 | Iran, Islamic Republic of | 4 | 2.6% |
6 | Germany | 3 | 1.9% |
7 | Russia | 3 | 1.9% |
8 | Korea, Republic of | 2 | 1.3% |