2021 | 总访问次数
排名 | 国家/地区 | 数量 | 占比 |
1 | China | 19 | 39.6% |
2 | United States | 13 | 27.1% |
3 | Germany | 6 | 12.5% |
4 | Kazakhstan | 3 | 6.2% |
5 | Canada | 2 | 4.2% |
6 | Netherlands | 2 | 4.2% |
7 | Switzerland | 1 | 2.1% |
8 | Taiwan | 1 | 2.1% |
9 | Korea, Republic of | 1 | 2.1% |