2021 | 总访问次数
排名 | 国家/地区 | 数量 | 占比 |
1 | China | 15 | 46.9% |
2 | Germany | 8 | 25% |
3 | United States | 7 | 21.9% |
4 | Switzerland | 2 | 6.2% |
排名 | 国家/地区 | 数量 | 占比 |
1 | China | 15 | 46.9% |
2 | Germany | 8 | 25% |
3 | United States | 7 | 21.9% |
4 | Switzerland | 2 | 6.2% |