2021 | 总访问次数
排名 | 国家/地区 | 数量 | 占比 |
1 | China | 15 | 57.7% |
2 | Germany | 6 | 23.1% |
3 | United States | 3 | 11.5% |
4 | Switzerland | 2 | 7.7% |
排名 | 国家/地区 | 数量 | 占比 |
1 | China | 15 | 57.7% |
2 | Germany | 6 | 23.1% |
3 | United States | 3 | 11.5% |
4 | Switzerland | 2 | 7.7% |