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Number of publications dealing with 3D PDF by type (assignment to more than one article type was possible).
| Year | Article type, n | Total, n | |||
|
|
Tool | Application | Descriptive | Mentioning |
|
| 2008 | 3 | 5 | — | — | 5 |
| 2009 | — | 6 | 1 | — | 7 |
| 2010 | 2 | 9 | — | 1 | 13 |
| 2011 | 3 | 13 | 1 | 1 | 18 |
| 2012 | 2 | 13 | 2 | 1 | 18 |
| 2013 | 4 | 20 | 1 | 2 | 24 |
| 2014 | 1 | 23 | 5 | 2 | 28 |
| 2015 | 1 | 31 | 2 | — | 34 |
| 2016 | 1 | 18 | 3 | 1 | 25 |
| 2017 | 1 | 12 | 2 | 4 | 19 |
| 2018 (until April) | 1 | 6 | — | 1 | 9 |
