2018 | 总访问次数
排名 | 国家/地区 | 数量 | 占比 |
1 | United States | 17 | 44.7% |
2 | China | 11 | 28.9% |
3 | Germany | 9 | 23.7% |
4 | Republic of Korea | 1 | 2.6% |
排名 | 国家/地区 | 数量 | 占比 |
1 | United States | 17 | 44.7% |
2 | China | 11 | 28.9% |
3 | Germany | 9 | 23.7% |
4 | Republic of Korea | 1 | 2.6% |