| Value | Category | Cases | |
|---|---|---|---|
| 2002 | 1 |
0.5%
|
|
| 2004 | 1 |
0.5%
|
|
| 2005 | 1 |
0.5%
|
|
| 2006 | 2 |
1%
|
|
| 2007 | 3 |
1.5%
|
|
| 2008 | 8 |
4.1%
|
|
| 2009 | 35 |
17.8%
|
|
| 2010 | 28 |
14.2%
|
|
| 2011 | 14 |
7.1%
|
|
| 2012 | 19 |
9.6%
|
|
| 2013 | 29 |
14.7%
|
|
| 2014 | 26 |
13.2%
|
|
| 2015 | 28 |
14.2%
|
|
| 2016 | 2 |
1%
|
|
| Sysmiss | 35 |