| Value | Category | Cases | |
|---|---|---|---|
| 1969 | 1 |
0%
|
|
| 1970 | 7 |
0.2%
|
|
| 1971 | 16 |
0.4%
|
|
| 1972 | 18 |
0.4%
|
|
| 1973 | 13 |
0.3%
|
|
| 1974 | 14 |
0.3%
|
|
| 1975 | 9 |
0.2%
|
|
| 1976 | 20 |
0.5%
|
|
| 1977 | 27 |
0.6%
|
|
| 1978 | 16 |
0.4%
|
|
| 1979 | 37 |
0.9%
|
|
| 1980 | 46 |
1.1%
|
|
| 1981 | 52 |
1.2%
|
|
| 1982 | 53 |
1.3%
|
|
| 1983 | 37 |
0.9%
|
|
| 1984 | 48 |
1.1%
|
|
| 1985 | 54 |
1.3%
|
|
| 1986 | 73 |
1.7%
|
|
| 1987 | 102 |
2.4%
|
|
| 1988 | 70 |
1.7%
|
|
| 1989 | 108 |
2.6%
|
|
| 1990 | 115 |
2.7%
|
|
| 1991 | 166 |
4%
|
|
| 1992 | 180 |
4.3%
|
|
| 1993 | 167 |
4%
|
|
| 1994 | 140 |
3.3%
|
|
| 1995 | 164 |
3.9%
|
|
| 1996 | 165 |
3.9%
|
|
| 1997 | 180 |
4.3%
|
|
| 1998 | 171 |
4.1%
|
|
| 1999 | 140 |
3.3%
|
|
| 2000 | 131 |
3.1%
|
|
| 2001 | 109 |
2.6%
|
|
| 2002 | 89 |
2.1%
|
|
| 2003 | 56 |
1.3%
|
|
| 2004 | 111 |
2.6%
|
|
| 2005 | 86 |
2%
|
|
| 2006 | 75 |
1.8%
|
|
| 2007 | 65 |
1.5%
|
|
| 2008 | 8 |
0.2%
|
|
| 2009 | 5 |
0.1%
|
|
| 9998 | don't know | 852 |
20.3%
|
| 9999 | not applicable | 73 |
1.7%
|
| 9999995 | missing:impute | 132 |
3.1%
|
| Sysmiss | 32 |