| Value | Category | Cases | |
|---|---|---|---|
| 1975 | 1 |
0%
|
|
| 1976 | 1 |
0%
|
|
| 1977 | 1 |
0%
|
|
| 1978 | 6 |
0.3%
|
|
| 1979 | 4 |
0.2%
|
|
| 1980 | 11 |
0.5%
|
|
| 1981 | 6 |
0.3%
|
|
| 1982 | 5 |
0.2%
|
|
| 1983 | 6 |
0.3%
|
|
| 1984 | 11 |
0.5%
|
|
| 1985 | 22 |
1%
|
|
| 1986 | 10 |
0.5%
|
|
| 1987 | 13 |
0.6%
|
|
| 1988 | 19 |
0.9%
|
|
| 1989 | 22 |
1%
|
|
| 1990 | 25 |
1.2%
|
|
| 1991 | 27 |
1.3%
|
|
| 1992 | 28 |
1.3%
|
|
| 1993 | 32 |
1.5%
|
|
| 1994 | 23 |
1.1%
|
|
| 1995 | 42 |
2%
|
|
| 1996 | 40 |
1.9%
|
|
| 1997 | 45 |
2.1%
|
|
| 1998 | 58 |
2.7%
|
|
| 1999 | 47 |
2.2%
|
|
| 2000 | 60 |
2.8%
|
|
| 2001 | 66 |
3.1%
|
|
| 2002 | 73 |
3.4%
|
|
| 2003 | 70 |
3.3%
|
|
| 2004 | 88 |
4.1%
|
|
| 2005 | 106 |
5%
|
|
| 2006 | 99 |
4.7%
|
|
| 2007 | 96 |
4.5%
|
|
| 2008 | 95 |
4.5%
|
|
| 2009 | 110 |
5.2%
|
|
| 2010 | 135 |
6.4%
|
|
| 2011 | 122 |
5.8%
|
|
| 2012 | 123 |
5.8%
|
|
| 2013 | 127 |
6%
|
|
| 2014 | 132 |
6.2%
|
|
| 2015 | 67 |
3.2%
|
|
| 2016 | 1 |
0%
|
|
| 9998 | don't know | 46 |
2.2%
|
| Sysmiss | 33662 |