2021 | 总访问次数
排名 | 国家/地区 | 数量 | 占比 |
1 | United States | 187 | 47.8% |
2 | China | 161 | 41.2% |
3 | Germany | 29 | 7.4% |
4 | Russia | 7 | 1.8% |
5 | Korea, Republic of | 3 | 0.8% |
6 | Iran, Islamic Republic of | 2 | 0.5% |
7 | Estonia | 1 | 0.3% |
8 | Australia | 1 | 0.3% |