| Value | Category | Cases | |
|---|---|---|---|
| 1990 | 2 |
0.3%
|
|
| 1993 | 2 |
0.3%
|
|
| 1994 | 2 |
0.3%
|
|
| 1995 | 2 |
0.3%
|
|
| 1997 | 6 |
0.8%
|
|
| 1998 | 5 |
0.7%
|
|
| 1999 | 5 |
0.7%
|
|
| 2000 | 11 |
1.4%
|
|
| 2001 | 10 |
1.3%
|
|
| 2002 | 10 |
1.3%
|
|
| 2003 | 19 |
2.5%
|
|
| 2004 | 17 |
2.2%
|
|
| 2005 | 27 |
3.6%
|
|
| 2006 | 19 |
2.5%
|
|
| 2007 | 22 |
2.9%
|
|
| 2008 | 31 |
4.1%
|
|
| 2009 | 37 |
4.9%
|
|
| 2010 | 40 |
5.3%
|
|
| 2011 | 56 |
7.4%
|
|
| 2012 | 85 |
11.2%
|
|
| 2013 | 113 |
14.9%
|
|
| 2014 | 117 |
15.4%
|
|
| 2015 | 111 |
14.6%
|
|
| 2016 | 1 |
0.1%
|
|
| 9998 | don't know | 10 |
1.3%
|
| Sysmiss | 10999 |