| Value | Category | Cases | |
|---|---|---|---|
| 1961 | 29 |
0.5%
|
|
| 1962 | 95 |
1.7%
|
|
| 1963 | 115 |
2.1%
|
|
| 1964 | 151 |
2.8%
|
|
| 1965 | 138 |
2.5%
|
|
| 1966 | 111 |
2%
|
|
| 1967 | 144 |
2.6%
|
|
| 1968 | 128 |
2.3%
|
|
| 1969 | 158 |
2.9%
|
|
| 1970 | 142 |
2.6%
|
|
| 1971 | 146 |
2.7%
|
|
| 1972 | 152 |
2.8%
|
|
| 1973 | 118 |
2.2%
|
|
| 1974 | 168 |
3.1%
|
|
| 1975 | 132 |
2.4%
|
|
| 1976 | 133 |
2.4%
|
|
| 1977 | 128 |
2.3%
|
|
| 1978 | 127 |
2.3%
|
|
| 1979 | 145 |
2.7%
|
|
| 1980 | 152 |
2.8%
|
|
| 1981 | 125 |
2.3%
|
|
| 1982 | 161 |
3%
|
|
| 1983 | 124 |
2.3%
|
|
| 1984 | 143 |
2.6%
|
|
| 1985 | 159 |
2.9%
|
|
| 1986 | 135 |
2.5%
|
|
| 1987 | 159 |
2.9%
|
|
| 1988 | 171 |
3.1%
|
|
| 1989 | 193 |
3.5%
|
|
| 1990 | 240 |
4.4%
|
|
| 1991 | 224 |
4.1%
|
|
| 1992 | 220 |
4%
|
|
| 1993 | 233 |
4.3%
|
|
| 1994 | 223 |
4.1%
|
|
| 1995 | 228 |
4.2%
|
|
| 1996 | 96 |
1.8%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | DK | 7 |
0.1%
|
| 9999 | Missing | 0 |
0%
|
| Sysmiss | 115 |