| Value | Category | Cases | |
|---|---|---|---|
| 1981 | 1 |
0%
|
|
| 1982 | 2 |
0%
|
|
| 1983 | 4 |
0.1%
|
|
| 1984 | 7 |
0.1%
|
|
| 1985 | 13 |
0.2%
|
|
| 1986 | 17 |
0.3%
|
|
| 1987 | 28 |
0.4%
|
|
| 1988 | 45 |
0.7%
|
|
| 1989 | 47 |
0.7%
|
|
| 1990 | 64 |
0.9%
|
|
| 1991 | 76 |
1.1%
|
|
| 1992 | 79 |
1.2%
|
|
| 1993 | 106 |
1.6%
|
|
| 1994 | 112 |
1.6%
|
|
| 1995 | 126 |
1.9%
|
|
| 1996 | 144 |
2.1%
|
|
| 1997 | 158 |
2.3%
|
|
| 1998 | 154 |
2.3%
|
|
| 1999 | 185 |
2.7%
|
|
| 2000 | 266 |
3.9%
|
|
| 2001 | 231 |
3.4%
|
|
| 2002 | 244 |
3.6%
|
|
| 2003 | 260 |
3.8%
|
|
| 2004 | 248 |
3.6%
|
|
| 2005 | 290 |
4.3%
|
|
| 2006 | 311 |
4.6%
|
|
| 2007 | 361 |
5.3%
|
|
| 2008 | 342 |
5%
|
|
| 2009 | 390 |
5.7%
|
|
| 2010 | 468 |
6.9%
|
|
| 2011 | 378 |
5.6%
|
|
| 2012 | 407 |
6%
|
|
| 2013 | 440 |
6.5%
|
|
| 2014 | 460 |
6.8%
|
|
| 2015 | 244 |
3.6%
|
|
| 2016 | 6 |
0.1%
|
|
| 9998 | don't know | 82 |
1.2%
|
| Sysmiss | 31922 |