| Value | Category | Cases | |
|---|---|---|---|
| 1965 | 2 |
0.1%
|
|
| 1966 | 6 |
0.3%
|
|
| 1967 | 5 |
0.2%
|
|
| 1968 | 9 |
0.4%
|
|
| 1969 | 10 |
0.4%
|
|
| 1970 | 18 |
0.8%
|
|
| 1971 | 19 |
0.8%
|
|
| 1972 | 20 |
0.9%
|
|
| 1973 | 20 |
0.9%
|
|
| 1974 | 20 |
0.9%
|
|
| 1975 | 17 |
0.7%
|
|
| 1976 | 18 |
0.8%
|
|
| 1977 | 25 |
1.1%
|
|
| 1978 | 26 |
1.1%
|
|
| 1979 | 41 |
1.8%
|
|
| 1980 | 54 |
2.3%
|
|
| 1981 | 44 |
1.9%
|
|
| 1982 | 48 |
2%
|
|
| 1983 | 56 |
2.4%
|
|
| 1984 | 51 |
2.2%
|
|
| 1985 | 52 |
2.2%
|
|
| 1986 | 60 |
2.6%
|
|
| 1987 | 57 |
2.4%
|
|
| 1988 | 54 |
2.3%
|
|
| 1989 | 86 |
3.7%
|
|
| 1990 | 109 |
4.7%
|
|
| 1991 | 107 |
4.6%
|
|
| 1992 | 104 |
4.4%
|
|
| 1993 | 93 |
4%
|
|
| 1994 | 105 |
4.5%
|
|
| 1995 | 82 |
3.5%
|
|
| 1996 | 96 |
4.1%
|
|
| 1997 | 81 |
3.5%
|
|
| 1998 | 83 |
3.5%
|
|
| 1999 | 68 |
2.9%
|
|
| 2000 | 59 |
2.5%
|
|
| 2001 | 46 |
2%
|
|
| 2002 | 42 |
1.8%
|
|
| 2003 | 36 |
1.5%
|
|
| 2004 | 34 |
1.5%
|
|
| 2005 | 44 |
1.9%
|
|
| 2006 | 43 |
1.8%
|
|
| 2007 | 25 |
1.1%
|
|
| 2008 | 8 |
0.3%
|
|
| 2009 | 2 |
0.1%
|
|
| 2010 | 1 |
0%
|
|
| 9998 | don't know | 198 |
8.5%
|
| 9999 | not applicable | 24 |
1%
|
| 9999995 | missing:impute | 34 |
1.5%
|
| Sysmiss | 28 |