| Value | Category | Cases | |
|---|---|---|---|
| 1981 | 2 |
0.1%
|
|
| 1982 | 4 |
0.1%
|
|
| 1983 | 5 |
0.2%
|
|
| 1984 | 10 |
0.3%
|
|
| 1985 | 24 |
0.8%
|
|
| 1986 | 25 |
0.8%
|
|
| 1987 | 27 |
0.9%
|
|
| 1988 | 36 |
1.2%
|
|
| 1989 | 29 |
1%
|
|
| 1990 | 67 |
2.2%
|
|
| 1991 | 50 |
1.6%
|
|
| 1992 | 56 |
1.8%
|
|
| 1993 | 80 |
2.6%
|
|
| 1994 | 61 |
2%
|
|
| 1995 | 73 |
2.4%
|
|
| 1996 | 80 |
2.6%
|
|
| 1997 | 83 |
2.7%
|
|
| 1998 | 98 |
3.2%
|
|
| 1999 | 122 |
4%
|
|
| 2000 | 129 |
4.2%
|
|
| 2001 | 80 |
2.6%
|
|
| 2002 | 95 |
3.1%
|
|
| 2003 | 88 |
2.9%
|
|
| 2004 | 112 |
3.7%
|
|
| 2005 | 118 |
3.9%
|
|
| 2006 | 107 |
3.5%
|
|
| 2007 | 142 |
4.7%
|
|
| 2008 | 99 |
3.2%
|
|
| 2009 | 144 |
4.7%
|
|
| 2010 | 188 |
6.2%
|
|
| 2011 | 153 |
5%
|
|
| 2012 | 176 |
5.8%
|
|
| 2013 | 195 |
6.4%
|
|
| 2014 | 166 |
5.4%
|
|
| 2015 | 112 |
3.7%
|
|
| 2016 | 4 |
0.1%
|
|
| 9998 | don't know | 10 |
0.3%
|
| Sysmiss | 35668 |