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 | 6 |
| Non-citable documents | 2012 | 11 |
| Non-citable documents | 2013 | 17 |
| Non-citable documents | 2014 | 16 |
| Non-citable documents | 2015 | 13 |
| Non-citable documents | 2016 | 24 |
| Citable documents | 2010 | 18 |
| Citable documents | 2011 | 82 |
| Citable documents | 2012 | 184 |
| Citable documents | 2013 | 226 |
| Citable documents | 2014 | 184 |
| Citable documents | 2015 | 173 |
| Citable documents | 2016 | 167 |