| Value | Category | Cases | |
|---|---|---|---|
| 1965 | 9 |
0.5%
|
|
| 1966 | 6 |
0.3%
|
|
| 1968 | 16 |
0.9%
|
|
| 1970 | 20 |
1.1%
|
|
| 1972 | 5 |
0.3%
|
|
| 1973 | 22 |
1.2%
|
|
| 1974 | 28 |
1.6%
|
|
| 1975 | 26 |
1.5%
|
|
| 1976 | 5 |
0.3%
|
|
| 1977 | 9 |
0.5%
|
|
| 1978 | 42 |
2.4%
|
|
| 1979 | 20 |
1.1%
|
|
| 1980 | 34 |
1.9%
|
|
| 1981 | 36 |
2%
|
|
| 1982 | 28 |
1.6%
|
|
| 1983 | 85 |
4.8%
|
|
| 1984 | 77 |
4.4%
|
|
| 1985 | 36 |
2%
|
|
| 1986 | 57 |
3.2%
|
|
| 1987 | 59 |
3.3%
|
|
| 1988 | 41 |
2.3%
|
|
| 1989 | 87 |
4.9%
|
|
| 1990 | 81 |
4.6%
|
|
| 1991 | 43 |
2.4%
|
|
| 1992 | 61 |
3.5%
|
|
| 1993 | 78 |
4.4%
|
|
| 1994 | 77 |
4.4%
|
|
| 1995 | 83 |
4.7%
|
|
| 1996 | 75 |
4.2%
|
|
| 1997 | 71 |
4%
|
|
| 1998 | 121 |
6.8%
|
|
| 1999 | 155 |
8.8%
|
|
| 2000 | 121 |
6.8%
|
|
| 9997 | inconsistent | 7 |
0.4%
|
| 9998 | dk | 46 |
2.6%
|
| Sysmiss | 13179 |