2017 | 总访问次数
排名 | 国家/地区 | 数量 | 占比 |
1 | United States | 16 | 41% |
2 | Germany | 15 | 38.5% |
3 | China | 7 | 17.9% |
4 | Switzerland | 1 | 2.6% |
排名 | 国家/地区 | 数量 | 占比 |
1 | United States | 16 | 41% |
2 | Germany | 15 | 38.5% |
3 | China | 7 | 17.9% |
4 | Switzerland | 1 | 2.6% |