Not every article in a journal is considered primary research and therefore "citable", this chart shows the ratio of a journal's articles including substantial research (research articles, conference papers and reviews) in three year windows vs. those documents other than research articles, reviews and conference papers.
| Documents | Year | Value |
| Non-citable documents | 2002 | 0 |
| Non-citable documents | 2003 | 0 |
| Non-citable documents | 2004 | 0 |
| Non-citable documents | 2005 | 0 |
| Non-citable documents | 2006 | 0 |
| Non-citable documents | 2007 | 0 |
| Non-citable documents | 2008 | 0 |
| Non-citable documents | 2014 | 0 |
| Non-citable documents | 2015 | 4 |
| Non-citable documents | 2016 | 5 |
| Citable documents | 2002 | 348 |
| Citable documents | 2003 | 651 |
| Citable documents | 2004 | 934 |
| Citable documents | 2005 | 895 |
| Citable documents | 2006 | 932 |
| Citable documents | 2007 | 649 |
| Citable documents | 2008 | 340 |
| Citable documents | 2014 | 290 |
| Citable documents | 2015 | 558 |
| Citable documents | 2016 | 778 |