| Value | Category | Cases | |
|---|---|---|---|
| 1973 | 1 |
0%
|
|
| 1974 | 1 |
0%
|
|
| 1977 | 2 |
0.1%
|
|
| 1978 | 5 |
0.1%
|
|
| 1979 | 3 |
0.1%
|
|
| 1980 | 12 |
0.3%
|
|
| 1981 | 4 |
0.1%
|
|
| 1982 | 8 |
0.2%
|
|
| 1983 | 15 |
0.4%
|
|
| 1984 | 19 |
0.5%
|
|
| 1985 | 25 |
0.6%
|
|
| 1986 | 28 |
0.7%
|
|
| 1987 | 41 |
1%
|
|
| 1988 | 37 |
0.9%
|
|
| 1989 | 30 |
0.8%
|
|
| 1990 | 48 |
1.2%
|
|
| 1991 | 47 |
1.2%
|
|
| 1992 | 59 |
1.5%
|
|
| 1993 | 64 |
1.6%
|
|
| 1994 | 75 |
1.9%
|
|
| 1995 | 93 |
2.4%
|
|
| 1996 | 99 |
2.5%
|
|
| 1997 | 96 |
2.4%
|
|
| 1998 | 104 |
2.6%
|
|
| 1999 | 118 |
3%
|
|
| 2000 | 148 |
3.7%
|
|
| 2001 | 138 |
3.5%
|
|
| 2002 | 125 |
3.2%
|
|
| 2003 | 140 |
3.5%
|
|
| 2004 | 127 |
3.2%
|
|
| 2005 | 159 |
4%
|
|
| 2006 | 179 |
4.5%
|
|
| 2007 | 203 |
5.1%
|
|
| 2008 | 201 |
5.1%
|
|
| 2009 | 181 |
4.6%
|
|
| 2010 | 212 |
5.4%
|
|
| 2011 | 213 |
5.4%
|
|
| 2012 | 209 |
5.3%
|
|
| 2013 | 210 |
5.3%
|
|
| 2014 | 248 |
6.3%
|
|
| 2015 | 140 |
3.5%
|
|
| 2016 | 6 |
0.2%
|
|
| 9998 | don't know | 78 |
2%
|
| Sysmiss | 8964 |