2018 | 总访问次数
排名 | 国家/地区 | 数量 | 占比 |
1 | United States | 19 | 45.2% |
2 | Germany | 11 | 26.2% |
3 | China | 9 | 21.4% |
4 | Republic of Korea | 3 | 7.1% |
排名 | 国家/地区 | 数量 | 占比 |
1 | United States | 19 | 45.2% |
2 | Germany | 11 | 26.2% |
3 | China | 9 | 21.4% |
4 | Republic of Korea | 3 | 7.1% |