2018 | 总访问次数
排名 | 国家/地区 | 数量 | 占比 |
1 | United States | 20 | 35.1% |
2 | Germany | 12 | 21.1% |
3 | China | 11 | 19.3% |
4 | Netherlands | 4 | 7% |
5 | Taiwan | 4 | 7% |
6 | Romania | 3 | 5.3% |
7 | Republic of Korea | 1 | 1.8% |
8 | Finland | 1 | 1.8% |
9 | Hong Kong | 1 | 1.8% |