| Value | Category | Cases | |
|---|---|---|---|
| 1952 | 40 |
1.2%
|
|
| 1953 | 33 |
1%
|
|
| 1954 | 36 |
1.1%
|
|
| 1955 | 48 |
1.4%
|
|
| 1956 | 48 |
1.4%
|
|
| 1957 | 53 |
1.6%
|
|
| 1958 | 36 |
1.1%
|
|
| 1959 | 49 |
1.5%
|
|
| 1960 | 38 |
1.1%
|
|
| 1961 | 38 |
1.1%
|
|
| 1962 | 54 |
1.6%
|
|
| 1963 | 59 |
1.8%
|
|
| 1964 | 54 |
1.6%
|
|
| 1965 | 51 |
1.5%
|
|
| 1966 | 74 |
2.2%
|
|
| 1967 | 43 |
1.3%
|
|
| 1968 | 61 |
1.8%
|
|
| 1969 | 74 |
2.2%
|
|
| 1970 | 64 |
1.9%
|
|
| 1971 | 59 |
1.8%
|
|
| 1972 | 76 |
2.3%
|
|
| 1973 | 75 |
2.3%
|
|
| 1974 | 61 |
1.8%
|
|
| 1975 | 66 |
2%
|
|
| 1976 | 98 |
3%
|
|
| 1977 | 65 |
2%
|
|
| 1978 | 59 |
1.8%
|
|
| 1979 | 105 |
3.2%
|
|
| 1980 | 58 |
1.7%
|
|
| 1981 | 75 |
2.3%
|
|
| 1982 | 91 |
2.7%
|
|
| 1983 | 89 |
2.7%
|
|
| 1984 | 68 |
2%
|
|
| 1985 | 63 |
1.9%
|
|
| 1986 | 96 |
2.9%
|
|
| 1987 | 73 |
2.2%
|
|
| 1988 | 65 |
2%
|
|
| 1989 | 84 |
2.5%
|
|
| 1990 | 86 |
2.6%
|
|
| 1991 | 91 |
2.7%
|
|
| 1992 | 122 |
3.7%
|
|
| 1993 | 159 |
4.8%
|
|
| 1994 | 152 |
4.6%
|
|
| 1995 | 156 |
4.7%
|
|
| 1996 | 162 |
4.9%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | DK | 14 |
0.4%
|
| 9999 | Missing | 0 |
0%
|
| Sysmiss | 190 |