| Value | Category | Cases | |
|---|---|---|---|
| 1993 | 2 |
0.5%
|
|
| 1995 | 1 |
0.3%
|
|
| 1997 | 1 |
0.3%
|
|
| 1998 | 1 |
0.3%
|
|
| 1999 | 4 |
1%
|
|
| 2000 | 3 |
0.8%
|
|
| 2001 | 4 |
1%
|
|
| 2002 | 10 |
2.6%
|
|
| 2003 | 5 |
1.3%
|
|
| 2004 | 12 |
3.1%
|
|
| 2005 | 10 |
2.6%
|
|
| 2006 | 15 |
3.8%
|
|
| 2007 | 25 |
6.4%
|
|
| 2008 | 17 |
4.3%
|
|
| 2009 | 24 |
6.1%
|
|
| 2010 | 45 |
11.5%
|
|
| 2011 | 39 |
10%
|
|
| 2012 | 37 |
9.5%
|
|
| 2013 | 44 |
11.3%
|
|
| 2014 | 45 |
11.5%
|
|
| 2015 | 41 |
10.5%
|
|
| 9998 | don't know | 6 |
1.5%
|
| Sysmiss | 11368 |