2018 | 总访问次数
排名 | 国家/地区 | 数量 | 占比 |
1 | United States | 20 | 32.8% |
2 | China | 16 | 26.2% |
3 | Germany | 13 | 21.3% |
4 | Netherlands | 5 | 8.2% |
5 | Romania | 3 | 4.9% |
6 | Republic of Korea | 1 | 1.6% |
7 | Korea, Republic of | 1 | 1.6% |
8 | Bulgaria | 1 | 1.6% |
9 | Canada | 1 | 1.6% |