2017 | 总访问次数
排名 | 国家/地区 | 数量 | 占比 |
1 | United States | 16 | 76.2% |
2 | Germany | 3 | 14.3% |
3 | Switzerland | 1 | 4.8% |
4 | China | 1 | 4.8% |
排名 | 国家/地区 | 数量 | 占比 |
1 | United States | 16 | 76.2% |
2 | Germany | 3 | 14.3% |
3 | Switzerland | 1 | 4.8% |
4 | China | 1 | 4.8% |