| Value | Category | Cases | |
|---|---|---|---|
| 1987 | 5 |
0.1%
|
|
| 1989 | 9 |
0.2%
|
|
| 1990 | 40 |
0.7%
|
|
| 1991 | 57 |
1%
|
|
| 1992 | 64 |
1.2%
|
|
| 1993 | 75 |
1.4%
|
|
| 1994 | 68 |
1.2%
|
|
| 1995 | 89 |
1.6%
|
|
| 1996 | 72 |
1.3%
|
|
| 1997 | 92 |
1.7%
|
|
| 1998 | 88 |
1.6%
|
|
| 1999 | 99 |
1.8%
|
|
| 2000 | 197 |
3.6%
|
|
| 2001 | 84 |
1.5%
|
|
| 2002 | 109 |
2%
|
|
| 2003 | 88 |
1.6%
|
|
| 2004 | 115 |
2.1%
|
|
| 2005 | 128 |
2.3%
|
|
| 2006 | 136 |
2.5%
|
|
| 2007 | 126 |
2.3%
|
|
| 2008 | 175 |
3.2%
|
|
| 2009 | 165 |
3%
|
|
| 2010 | 169 |
3.1%
|
|
| 2011 | 146 |
2.6%
|
|
| 2012 | 166 |
3%
|
|
| 2013 | 115 |
2.1%
|
|
| 2014 | 140 |
2.5%
|
|
| 2015 | 135 |
2.4%
|
|
| 2016 | 79 |
1.4%
|
|
| 2017 | 99 |
1.8%
|
|
| 2018 | 49 |
0.9%
|
|
| 9998 | DK | 37 |
0.7%
|
| Sysmiss | 2297 |
41.7%
|