| Value | Category | Cases | |
|---|---|---|---|
| 2009 | 1 |
0.1%
|
|
| 2011 | 33 |
1.7%
|
|
| 2012 | 147 |
7.4%
|
|
| 2013 | 328 |
16.4%
|
|
| 2014 | 343 |
17.2%
|
|
| 2015 | 403 |
20.2%
|
|
| 2016 | 668 |
33.4%
|
|
| 2017 | 77 |
3.9%
|
|
| Sysmiss | 2776 |