2018 | 总访问次数
排名 | 国家/地区 | 数量 | 占比 |
1 | United States | 20 | 35.1% |
2 | China | 16 | 28.1% |
3 | Germany | 13 | 22.8% |
4 | Netherlands | 3 | 5.3% |
5 | Republic of Korea | 1 | 1.8% |
6 | Serbia | 1 | 1.8% |
7 | Spain | 1 | 1.8% |
8 | Japan | 1 | 1.8% |
9 | Malaysia | 1 | 1.8% |