BPG致力于知识的发现和传播
Total Visits of This Article
2021 | 总访问次数
排名 国家/地区 数量 占比
1 China 494 44.8%
2 United States 237 21.5%
3 Netherlands 192 17.4%
4 Germany 80 7.3%
5 France 44 4%
6 Canada 16 1.5%
7 Hong Kong 11 1%
8 Korea, Republic of 5 0.5%
9 Finland 4 0.4%
10 Russia 4 0.4%
11 Norway 2 0.2%
12 India 2 0.2%
13 Bulgaria 2 0.2%
14 South Africa 2 0.2%
15 Spain 2 0.2%
16 Taiwan 1 0.1%
17 Austria 1 0.1%
18 Brazil 1 0.1%
19 Japan 1 0.1%
20 Singapore 1 0.1%