| Value | Category | Cases | |
|---|---|---|---|
| 2006 | 2 |
2.6%
|
|
| 2007 | 1 |
1.3%
|
|
| 2008 | 9 |
11.8%
|
|
| 2009 | 4 |
5.3%
|
|
| 2010 | 10 |
13.2%
|
|
| 2011 | 1 |
1.3%
|
|
| 2012 | 11 |
14.5%
|
|
| 2013 | 1 |
1.3%
|
|
| 2014 | 7 |
9.2%
|
|
| 2015 | 8 |
10.5%
|
|
| 2016 | 7 |
9.2%
|
|
| 2017 | 8 |
10.5%
|
|
| 2018 | 7 |
9.2%
|
|
| Sysmiss | 1264 |