2020 | 总访问次数
排名 | 国家/地区 | 数量 | 占比 |
1 | China | 19 | 38% |
2 | Germany | 10 | 20% |
3 | Iran, Islamic Republic of | 7 | 14% |
4 | United States | 6 | 12% |
5 | United Kingdom | 2 | 4% |
6 | Korea, Republic of | 2 | 4% |
7 | Netherlands | 2 | 4% |
8 | Ukraine | 1 | 2% |
9 | France | 1 | 2% |