2018 | 总访问次数
排名 | 国家/地区 | 数量 | 占比 |
1 | United States | 14 | 42.4% |
2 | Germany | 9 | 27.3% |
3 | China | 8 | 24.2% |
4 | Republic of Korea | 2 | 6.1% |
排名 | 国家/地区 | 数量 | 占比 |
1 | United States | 14 | 42.4% |
2 | Germany | 9 | 27.3% |
3 | China | 8 | 24.2% |
4 | Republic of Korea | 2 | 6.1% |