| Value | Category | Cases | |
|---|---|---|---|
| 1996 | 7 |
4.7%
|
|
| 1997 | 11 |
7.4%
|
|
| 1998 | 8 |
5.4%
|
|
| 2000 | 5 |
3.4%
|
|
| 2002 | 6 |
4.1%
|
|
| 2003 | 5 |
3.4%
|
|
| 2004 | 5 |
3.4%
|
|
| 2005 | 18 |
12.2%
|
|
| 2006 | 7 |
4.7%
|
|
| 2007 | 10 |
6.8%
|
|
| 2008 | 10 |
6.8%
|
|
| 2009 | 5 |
3.4%
|
|
| 2011 | 8 |
5.4%
|
|
| 2012 | 20 |
13.5%
|
|
| 2013 | 13 |
8.8%
|
|
| 2014 | 2 |
1.4%
|
|
| 2015 | 8 |
5.4%
|
|
| 9998 | don't know | 0 |
0%
|
| Sysmiss | 62445 |