| Value | Category | Cases | |
|---|---|---|---|
| 2004 | 2 |
3.8%
|
|
| 2005 | 4 |
7.5%
|
|
| 2007 | 2 |
3.8%
|
|
| 2008 | 1 |
1.9%
|
|
| 2009 | 4 |
7.5%
|
|
| 2010 | 2 |
3.8%
|
|
| 2011 | 3 |
5.7%
|
|
| 2012 | 10 |
18.9%
|
|
| 2013 | 5 |
9.4%
|
|
| 2014 | 10 |
18.9%
|
|
| 2015 | 10 |
18.9%
|
|
| Sysmiss | 2534 |