2018 | 总访问次数
排名 | 国家/地区 | 数量 | 占比 |
1 | United States | 37 | 46.2% |
2 | Germany | 16 | 20% |
3 | China | 11 | 13.8% |
4 | Czech Republic | 4 | 5% |
5 | Netherlands | 4 | 5% |
6 | 3 | 3.8% | |
7 | Korea, Republic of | 2 | 2.5% |
8 | Republic of Korea | 1 | 1.2% |
9 | Taiwan | 1 | 1.2% |
10 | Japan | 1 | 1.2% |