| Value | Category | Cases | |
|---|---|---|---|
| 1989 | 9 |
3.7%
|
|
| 1994 | 2 |
0.8%
|
|
| 1998 | 7 |
2.9%
|
|
| 2002 | 4 |
1.6%
|
|
| 2003 | 3 |
1.2%
|
|
| 2004 | 13 |
5.3%
|
|
| 2005 | 9 |
3.7%
|
|
| 2006 | 17 |
6.9%
|
|
| 2008 | 22 |
9%
|
|
| 2009 | 9 |
3.7%
|
|
| 2010 | 13 |
5.3%
|
|
| 2011 | 16 |
6.5%
|
|
| 2012 | 34 |
13.9%
|
|
| 2013 | 23 |
9.4%
|
|
| 2014 | 44 |
18%
|
|
| 2015 | 7 |
2.9%
|
|
| 2016 | 3 |
1.2%
|
|
| 9998 | don't know | 10 |
4.1%
|
| Sysmiss | 62348 |