2018 | 总访问次数
排名 | 国家/地区 | 数量 | 占比 |
1 | China | 17 | 34.7% |
2 | United States | 15 | 30.6% |
3 | Germany | 8 | 16.3% |
4 | Russia | 4 | 8.2% |
5 | South Africa | 1 | 2% |
6 | France | 1 | 2% |
7 | Japan | 1 | 2% |
8 | Korea, Republic of | 1 | 2% |
9 | Republic of Korea | 1 | 2% |