2018 | 总访问次数
排名 | 国家/地区 | 数量 | 占比 |
1 | United States | 18 | 42.9% |
2 | Germany | 9 | 21.4% |
3 | China | 5 | 11.9% |
4 | Netherlands | 4 | 9.5% |
5 | Republic of Korea | 2 | 4.8% |
6 | Taiwan | 1 | 2.4% |
7 | Australia | 1 | 2.4% |
8 | Finland | 1 | 2.4% |
9 | Japan | 1 | 2.4% |