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 | 9 |
| Non-citable documents | 2011 | 15 |
| Non-citable documents | 2012 | 22 |
| Non-citable documents | 2013 | 21 |
| Non-citable documents | 2014 | 75 |
| Non-citable documents | 2015 | 149 |
| Non-citable documents | 2016 | 177 |
| Citable documents | 2010 | 492 |
| Citable documents | 2011 | 996 |
| Citable documents | 2012 | 1549 |
| Citable documents | 2013 | 1690 |
| Citable documents | 2014 | 2058 |
| Citable documents | 2015 | 2305 |
| Citable documents | 2016 | 3192 |