Table 1.
Cumulative and median impact factor of articles from each region
| Year | Cumulative impact factors | Median impact factors | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| China | USA | UK | Germany | Japan | South Korea | China | USA | UK | Germany | Japan | South Korea | |
| 2004 | 344.604 | 15393.468 | 2515.639 | 3332.788 | 2957.428 | 288.41 | 2.692 | 4.202 | 4.304 | 3.568 | 2.806 | 3.326 |
| 2005 | 387.774 | 15748.680 | 2527.391 | 3869.547 | 2909.071 | 415.235 | 2.692 | 4.304 | 4.959 | 4.421 | 3.348 | 2.732 |
| 2006 | 542.250 | 15728.758 | 2337.716 | 3430.667 | 2705.429 | 450.98 | 2.692 | 4.202 | 4.304 | 3.693 | 2.732 | 2.692 |
| 2007 | 745.716 | 16976.891 | 2777.760 | 4017.565 | 2637.568 | 457.462 | 2.692 | 4.304 | 4.304 | 4.304 | 2.732 | 3.348 |
| 2008 | 872.829 | 18383.301 | 2516.288 | 3528.121 | 2445.896 | 460.531 | 2.732 | 4.202 | 4.202 | 3.466 | 2.692 | 2.659 |
| 2009 | 1008.688 | 18934.461 | 2272.255 | 3663.200 | 2299.502 | 601.775 | 2.605 | 4.304 | 4.053 | 3.568 | 2.692 | 2.916 |
| 2010 | 1212.098 | 18158.917 | 2637.687 | 3488.621 | 2209.841 | 566.511 | 2.605 | 3.693 | 4.959 | 3.466 | 2.562 | 2.562 |
| 2011 | 1398.403 | 19753.856 | 2685.009 | 3638.619 | 2180.398 | 619.563 | 2.692 | 4.202 | 4.304 | 3.568 | 2.627 | 2.627 |
| 2012 | 1738.380 | 18695.207 | 2454.146 | 3492.870 | 2082.804 | 539.097 | 2.605 | 3.568 | 4.304 | 3.466 | 2.562 | 2.562 |
| 2013 | 1822.023 | 14523.517 | 2395.126 | 3468.483 | 2048.689 | 662.632 | 2.627 | 3.568 | 4.959 | 3.477 | 2.462 | 2.468 |
| Total(2009–2013) | 7179.592 | 90065.958 | 12444.223 | 17751.793 | 10821.234 | 2989.578 | 2.605 | 4.053 | 4.959 | 3.477 | 2.605 | 2.605 |
| Total(2004–2013) | 10072.765 | 172297.056 | 25119.017 | 35930.481 | 24476.626 | 5062.196 | 2.692 | 4.053 | 4.538 | 3.568 | 2.692 | 2.692 |