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 | 2010 | 1 |
| Non-citable documents | 2011 | 1 |
| Non-citable documents | 2012 | 7 |
| Non-citable documents | 2013 | 8 |
| Non-citable documents | 2014 | 9 |
| Non-citable documents | 2015 | 14 |
| Non-citable documents | 2016 | 13 |
| Citable documents | 2010 | 15 |
| Citable documents | 2011 | 16 |
| Citable documents | 2012 | 44 |
| Citable documents | 2013 | 43 |
| Citable documents | 2014 | 64 |
| Citable documents | 2015 | 80 |
| Citable documents | 2016 | 75 |