| Value | Category | Cases | |
|---|---|---|---|
| 2004 | 1 |
4.3%
|
|
| 2005 | 1 |
4.3%
|
|
| 2006 | 2 |
8.7%
|
|
| 2007 | 1 |
4.3%
|
|
| 2008 | 2 |
8.7%
|
|
| 2009 | 2 |
8.7%
|
|
| 2010 | 1 |
4.3%
|
|
| 2011 | 1 |
4.3%
|
|
| 2012 | 2 |
8.7%
|
|
| 2013 | 2 |
8.7%
|
|
| 2014 | 4 |
17.4%
|
|
| 2015 | 4 |
17.4%
|
|
| Sysmiss | 2564 |