| Value | Category | Cases | |
|---|---|---|---|
| 1962 | 14 |
1.2%
|
|
| 1963 | 25 |
2.2%
|
|
| 1964 | 24 |
2.1%
|
|
| 1965 | 29 |
2.6%
|
|
| 1966 | 32 |
2.8%
|
|
| 1967 | 17 |
1.5%
|
|
| 1968 | 17 |
1.5%
|
|
| 1969 | 23 |
2%
|
|
| 1970 | 26 |
2.3%
|
|
| 1971 | 34 |
3%
|
|
| 1972 | 30 |
2.7%
|
|
| 1973 | 24 |
2.1%
|
|
| 1974 | 25 |
2.2%
|
|
| 1975 | 33 |
2.9%
|
|
| 1976 | 43 |
3.8%
|
|
| 1977 | 29 |
2.6%
|
|
| 1978 | 18 |
1.6%
|
|
| 1979 | 26 |
2.3%
|
|
| 1980 | 35 |
3.1%
|
|
| 1981 | 42 |
3.7%
|
|
| 1982 | 27 |
2.4%
|
|
| 1983 | 33 |
2.9%
|
|
| 1984 | 39 |
3.5%
|
|
| 1985 | 43 |
3.8%
|
|
| 1986 | 37 |
3.3%
|
|
| 1987 | 32 |
2.8%
|
|
| 1988 | 45 |
4%
|
|
| 1989 | 36 |
3.2%
|
|
| 1990 | 39 |
3.5%
|
|
| 1991 | 37 |
3.3%
|
|
| 1992 | 35 |
3.1%
|
|
| 1993 | 35 |
3.1%
|
|
| 1994 | 48 |
4.3%
|
|
| 1995 | 42 |
3.7%
|
|
| 1996 | 51 |
4.5%
|
|
| 9998 | DK year | 0 |
0%
|
| Sysmiss | 89 |