| Value | Category | Cases | |
|---|---|---|---|
| 1980 | 5 |
0.1%
|
|
| 1983 | 8 |
0.2%
|
|
| 1984 | 9 |
0.2%
|
|
| 1986 | 30 |
0.6%
|
|
| 1987 | 39 |
0.8%
|
|
| 1988 | 38 |
0.8%
|
|
| 1989 | 50 |
1%
|
|
| 1990 | 42 |
0.8%
|
|
| 1991 | 23 |
0.5%
|
|
| 1992 | 60 |
1.2%
|
|
| 1993 | 93 |
1.9%
|
|
| 1994 | 62 |
1.3%
|
|
| 1995 | 72 |
1.5%
|
|
| 1996 | 97 |
2%
|
|
| 1997 | 64 |
1.3%
|
|
| 1998 | 117 |
2.4%
|
|
| 1999 | 110 |
2.2%
|
|
| 2000 | 201 |
4.1%
|
|
| 2001 | 104 |
2.1%
|
|
| 2002 | 200 |
4%
|
|
| 2003 | 169 |
3.4%
|
|
| 2004 | 169 |
3.4%
|
|
| 2005 | 156 |
3.2%
|
|
| 2006 | 111 |
2.2%
|
|
| 2007 | 207 |
4.2%
|
|
| 2008 | 176 |
3.6%
|
|
| 2009 | 226 |
4.6%
|
|
| 2010 | 234 |
4.7%
|
|
| 2011 | 201 |
4.1%
|
|
| 2012 | 244 |
4.9%
|
|
| 2013 | 199 |
4%
|
|
| 2014 | 244 |
4.9%
|
|
| 2015 | 265 |
5.4%
|
|
| 2016 | 303 |
6.1%
|
|
| 2017 | 347 |
7%
|
|
| 2018 | 267 |
5.4%
|
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | don't know | 0 |
0%
|
| Sysmiss | 33504 |