2018 | 总访问次数
排名 | 国家/地区 | 数量 | 占比 |
1 | United States | 12 | 42.9% |
2 | Germany | 9 | 32.1% |
3 | China | 6 | 21.4% |
4 | Republic of Korea | 1 | 3.6% |
排名 | 国家/地区 | 数量 | 占比 |
1 | United States | 12 | 42.9% |
2 | Germany | 9 | 32.1% |
3 | China | 6 | 21.4% |
4 | Republic of Korea | 1 | 3.6% |