| Year | Number of articles | Number of citations |
| 2006 | 7 | 744 |
| 2007 | 5 | 453 |
| 2008 | 7 | 554 |
| 2009 | 5 | 260 |
| 2010 | 13 | 587 |
| 2011 | 10 | 358 |
| 2012 | 6 | 173 |
| 2013 | 10 | 107 |
| 2014 | 8 | 76 |
| 2015 | 10 | 5 |