| Value | Category | Cases | |
|---|---|---|---|
| 1983 | 1 |
0.1%
|
|
| 1984 | 7 |
0.4%
|
|
| 1985 | 12 |
0.6%
|
|
| 1986 | 14 |
0.7%
|
|
| 1987 | 21 |
1.1%
|
|
| 1988 | 30 |
1.6%
|
|
| 1989 | 29 |
1.5%
|
|
| 1990 | 30 |
1.6%
|
|
| 1991 | 45 |
2.4%
|
|
| 1992 | 30 |
1.6%
|
|
| 1993 | 35 |
1.8%
|
|
| 1994 | 38 |
2%
|
|
| 1995 | 28 |
1.5%
|
|
| 1996 | 34 |
1.8%
|
|
| 1997 | 49 |
2.6%
|
|
| 1998 | 37 |
1.9%
|
|
| 1999 | 40 |
2.1%
|
|
| 2000 | 39 |
2%
|
|
| 2001 | 30 |
1.6%
|
|
| 2002 | 30 |
1.6%
|
|
| 2003 | 45 |
2.4%
|
|
| 2004 | 39 |
2%
|
|
| 2005 | 50 |
2.6%
|
|
| 2006 | 39 |
2%
|
|
| 2007 | 55 |
2.9%
|
|
| 2008 | 60 |
3.1%
|
|
| 2009 | 53 |
2.8%
|
|
| 2010 | 47 |
2.5%
|
|
| 2011 | 54 |
2.8%
|
|
| 2012 | 60 |
3.1%
|
|
| 2013 | 56 |
2.9%
|
|
| 2014 | 68 |
3.6%
|
|
| 2015 | 58 |
3%
|
|
| 2016 | 58 |
3%
|
|
| 2017 | 56 |
2.9%
|
|
| 2018 | 33 |
1.7%
|
|
| 2019 | 29 |
1.5%
|
|
| 9998 | DK | 59 |
3.1%
|
| 9999 | NO RESPONSE | 3 |
0.2%
|
| Sysmiss | 411 |
21.5%
|