| Value | Category | Cases | |
|---|---|---|---|
| 2007 | 1 |
0.8%
|
|
| 2008 | 1 |
0.8%
|
|
| 2009 | 1 |
0.8%
|
|
| 2010 | 1 |
0.8%
|
|
| 2011 | 1 |
0.8%
|
|
| 2012 | 8 |
6.2%
|
|
| 2013 | 14 |
10.8%
|
|
| 2014 | 23 |
17.7%
|
|
| 2015 | 60 |
46.2%
|
|
| 2016 | 20 |
15.4%
|
|
| Sysmiss | 209 |