Table 2.
Distribution of publications from each region in the four grades (2004–2013)
| Rank | IF range | China (%) | USA (%) | UK (%) | Germany (%) | Japan (%) | South Korea (%) |
|---|---|---|---|---|---|---|---|
| Top 25% | 11.089-4.046 | 809(27.67) | 16901(51.63) | 2973(54.52) | 3583(47.91) | 2170(34.19) | 426(30.15) |
| Top 25%-50% | 3.693-2.462 | 942(32.22) | 10815(33.04) | 1383(25.36) | 1951(26.09) | 1486(23.41) | 415(29.37) |
| Bottom25%-50% | 2.427-1.679 | 770(26.33) | 3204(9.79) | 598(10.97) | 1310(17.52) | 1726(27.19) | 376(26.61) |
| Bottom 25% | 1.590-0.101 | 403(13.78) | 1812(5.54) | 499(9.15) | 635(8.49) | 965(15.20) | 196(13.87) |