2021 | 总访问次数
排名 | 国家/地区 | 数量 | 占比 |
1 | China | 19 | 45.2% |
2 | United States | 13 | 31% |
3 | Germany | 5 | 11.9% |
4 | Iran, Islamic Republic of | 3 | 7.1% |
5 | Spain | 2 | 4.8% |
排名 | 国家/地区 | 数量 | 占比 |
1 | China | 19 | 45.2% |
2 | United States | 13 | 31% |
3 | Germany | 5 | 11.9% |
4 | Iran, Islamic Republic of | 3 | 7.1% |
5 | Spain | 2 | 4.8% |