| Value | Category | Cases | |
|---|---|---|---|
| 2007 | 1 |
1.8%
|
|
| 2008 | 7 |
12.3%
|
|
| 2009 | 12 |
21.1%
|
|
| 2010 | 12 |
21.1%
|
|
| 2011 | 10 |
17.5%
|
|
| 2012 | 6 |
10.5%
|
|
| 2013 | 4 |
7%
|
|
| 2014 | 3 |
5.3%
|
|
| 2015 | 1 |
1.8%
|
|
| 2016 | 1 |
1.8%
|
|
| Sysmiss | 175 |