| Value | Category | Cases | |
|---|---|---|---|
| 1981 | 1 |
0%
|
|
| 1982 | 1 |
0%
|
|
| 1984 | 1 |
0%
|
|
| 1985 | 7 |
0.2%
|
|
| 1986 | 5 |
0.1%
|
|
| 1987 | 16 |
0.4%
|
|
| 1988 | 28 |
0.7%
|
|
| 1989 | 25 |
0.6%
|
|
| 1990 | 40 |
0.9%
|
|
| 1991 | 48 |
1.1%
|
|
| 1992 | 62 |
1.5%
|
|
| 1993 | 56 |
1.3%
|
|
| 1994 | 41 |
1%
|
|
| 1995 | 66 |
1.6%
|
|
| 1996 | 43 |
1%
|
|
| 1997 | 54 |
1.3%
|
|
| 1998 | 50 |
1.2%
|
|
| 1999 | 84 |
2%
|
|
| 2000 | 70 |
1.7%
|
|
| 2001 | 93 |
2.2%
|
|
| 2002 | 68 |
1.6%
|
|
| 2003 | 87 |
2.1%
|
|
| 2004 | 92 |
2.2%
|
|
| 2005 | 107 |
2.5%
|
|
| 2006 | 101 |
2.4%
|
|
| 2007 | 119 |
2.8%
|
|
| 2008 | 111 |
2.6%
|
|
| 2009 | 153 |
3.6%
|
|
| 2010 | 118 |
2.8%
|
|
| 2011 | 142 |
3.4%
|
|
| 2012 | 146 |
3.5%
|
|
| 2013 | 171 |
4.1%
|
|
| 2014 | 183 |
4.3%
|
|
| 2015 | 161 |
3.8%
|
|
| 2016 | 155 |
3.7%
|
|
| 2017 | 96 |
2.3%
|
|
| 2018 | 62 |
1.5%
|
|
| 2019 | 43 |
1%
|
|
| 9998 | DK | 18 |
0.4%
|
| 9999 | NO RESPONSE | 4 |
0.1%
|
| Sysmiss | 1291 |
30.6%
|