2018 | 总访问次数
排名 | 国家/地区 | 数量 | 占比 |
1 | United States | 21 | 38.2% |
2 | Germany | 13 | 23.6% |
3 | China | 11 | 20% |
4 | Netherlands | 5 | 9.1% |
5 | Republic of Korea | 1 | 1.8% |
6 | Taiwan | 1 | 1.8% |
7 | Czech Republic | 1 | 1.8% |
8 | Finland | 1 | 1.8% |
9 | Malaysia | 1 | 1.8% |