| Value | Category | Cases | |
|---|---|---|---|
| 2001 | 2 |
2.3%
|
|
| 2002 | 3 |
3.5%
|
|
| 2003 | 1 |
1.2%
|
|
| 2004 | 1 |
1.2%
|
|
| 2005 | 6 |
7%
|
|
| 2006 | 5 |
5.8%
|
|
| 2007 | 12 |
14%
|
|
| 2008 | 5 |
5.8%
|
|
| 2009 | 6 |
7%
|
|
| 2010 | 17 |
19.8%
|
|
| 2011 | 14 |
16.3%
|
|
| 2012 | 14 |
16.3%
|
|
| Sysmiss | 1453 |