2018 | 总访问次数
排名 | 国家/地区 | 数量 | 占比 |
1 | United States | 9 | 64.3% |
2 | Germany | 3 | 21.4% |
3 | Republic of Korea | 1 | 7.1% |
4 | China | 1 | 7.1% |
排名 | 国家/地区 | 数量 | 占比 |
1 | United States | 9 | 64.3% |
2 | Germany | 3 | 21.4% |
3 | Republic of Korea | 1 | 7.1% |
4 | China | 1 | 7.1% |