| Value | Category | Cases | |
|---|---|---|---|
| 1971 | 1 |
0%
|
|
| 1972 | 1 |
0%
|
|
| 1973 | 1 |
0%
|
|
| 1974 | 4 |
0.1%
|
|
| 1975 | 5 |
0.2%
|
|
| 1976 | 5 |
0.2%
|
|
| 1977 | 5 |
0.2%
|
|
| 1978 | 7 |
0.3%
|
|
| 1979 | 8 |
0.3%
|
|
| 1980 | 19 |
0.7%
|
|
| 1981 | 19 |
0.7%
|
|
| 1982 | 22 |
0.8%
|
|
| 1983 | 19 |
0.7%
|
|
| 1984 | 34 |
1.2%
|
|
| 1985 | 43 |
1.6%
|
|
| 1986 | 45 |
1.7%
|
|
| 1987 | 45 |
1.7%
|
|
| 1988 | 43 |
1.6%
|
|
| 1989 | 40 |
1.5%
|
|
| 1990 | 51 |
1.9%
|
|
| 1991 | 53 |
1.9%
|
|
| 1992 | 67 |
2.5%
|
|
| 1993 | 54 |
2%
|
|
| 1994 | 52 |
1.9%
|
|
| 1995 | 79 |
2.9%
|
|
| 1996 | 64 |
2.3%
|
|
| 1997 | 63 |
2.3%
|
|
| 1998 | 64 |
2.3%
|
|
| 1999 | 116 |
4.3%
|
|
| 2000 | 114 |
4.2%
|
|
| 2001 | 63 |
2.3%
|
|
| 2002 | 87 |
3.2%
|
|
| 2003 | 83 |
3%
|
|
| 2004 | 77 |
2.8%
|
|
| 2005 | 110 |
4%
|
|
| 2006 | 74 |
2.7%
|
|
| 2007 | 93 |
3.4%
|
|
| 2008 | 108 |
4%
|
|
| 2009 | 110 |
4%
|
|
| 2010 | 131 |
4.8%
|
|
| 2011 | 105 |
3.9%
|
|
| 2012 | 139 |
5.1%
|
|
| 2013 | 130 |
4.8%
|
|
| 2014 | 137 |
5%
|
|
| 2015 | 77 |
2.8%
|
|
| 2016 | 4 |
0.1%
|
|
| 9998 | don't know | 53 |
1.9%
|
| Sysmiss | 33059 |