| Value | Category | Cases | |
|---|---|---|---|
| 1992 | 2 |
2.5%
|
|
| 1993 | 1 |
1.2%
|
|
| 1995 | 1 |
1.2%
|
|
| 2000 | 1 |
1.2%
|
|
| 2002 | 2 |
2.5%
|
|
| 2004 | 2 |
2.5%
|
|
| 2005 | 1 |
1.2%
|
|
| 2006 | 8 |
9.9%
|
|
| 2007 | 13 |
16%
|
|
| 2008 | 17 |
21%
|
|
| 2009 | 21 |
25.9%
|
|
| 2010 | 6 |
7.4%
|
|
| 2011 | 1 |
1.2%
|
|
| 2013 | 5 |
6.2%
|
|
| Sysmiss | 386 |