2021 | 总访问次数
排名 | 国家/地区 | 数量 | 占比 |
1 | United States | 14 | 37.8% |
2 | China | 13 | 35.1% |
3 | Germany | 8 | 21.6% |
4 | Switzerland | 2 | 5.4% |
排名 | 国家/地区 | 数量 | 占比 |
1 | United States | 14 | 37.8% |
2 | China | 13 | 35.1% |
3 | Germany | 8 | 21.6% |
4 | Switzerland | 2 | 5.4% |