| Value | Category | Cases | |
|---|---|---|---|
| 1987 | 1 |
0%
|
|
| 1988 | 1 |
0%
|
|
| 1989 | 1 |
0%
|
|
| 1991 | 3 |
0.1%
|
|
| 1992 | 2 |
0.1%
|
|
| 1993 | 7 |
0.2%
|
|
| 1994 | 11 |
0.4%
|
|
| 1995 | 16 |
0.5%
|
|
| 1996 | 24 |
0.8%
|
|
| 1997 | 16 |
0.5%
|
|
| 1998 | 22 |
0.8%
|
|
| 1999 | 26 |
0.9%
|
|
| 2000 | 24 |
0.8%
|
|
| 2001 | 45 |
1.5%
|
|
| 2002 | 29 |
1%
|
|
| 2003 | 46 |
1.6%
|
|
| 2004 | 33 |
1.1%
|
|
| 2005 | 37 |
1.3%
|
|
| 2006 | 36 |
1.2%
|
|
| 2007 | 34 |
1.2%
|
|
| 2008 | 37 |
1.3%
|
|
| 2009 | 37 |
1.3%
|
|
| 2010 | 46 |
1.6%
|
|
| 2011 | 59 |
2%
|
|
| 2012 | 52 |
1.8%
|
|
| 2013 | 92 |
3.1%
|
|
| 2014 | 145 |
5%
|
|
| 2015 | 149 |
5.1%
|
|
| 2016 | 170 |
5.8%
|
|
| 2017 | 218 |
7.4%
|
|
| 2018 | 182 |
6.2%
|
|
| 9998 | DK | 1 |
0%
|
| Sysmiss | 1326 |
45.3%
|