2018 | 总访问次数
排名 | 国家/地区 | 数量 | 占比 |
1 | United States | 15 | 51.7% |
2 | Germany | 7 | 24.1% |
3 | China | 6 | 20.7% |
4 | Republic of Korea | 1 | 3.4% |
排名 | 国家/地区 | 数量 | 占比 |
1 | United States | 15 | 51.7% |
2 | Germany | 7 | 24.1% |
3 | China | 6 | 20.7% |
4 | Republic of Korea | 1 | 3.4% |