Table 3 Distribution of publications from each region in the four grades (2009–2013)
Rank | IF range | China (%) | USA (%) | UK (%) | Germany (%) | Japan (%) | South Korea (%) |
|---|---|---|---|---|---|---|---|
Top 25% | 11.089-4.046 | 579(27.07) | 8705(50.56) | 1468(54.29) | 1740(45.85) | 922(31.50) | 250(28.51) |
Top 25%-50% | 3.693-2.462 | 669(31.28) | 5662(32.89) | 659(24.37) | 958(25.24) | 637(21.76) | 246(28.05) |
Bottom25%-50% | 2.427-1.679 | 575(26.88) | 1890(10.98) | 358(13.24) | 782(20.61) | 902(30.82) | 259(29.53) |
Bottom 25% | 1.590-0.101 | 316(14.77) | 959(5.57) | 219(8.10) | 315(8.30) | 466(15.92) | 122(13.91) |