| Value | Category | Cases | |
|---|---|---|---|
| 1950 | 21 |
0.3%
|
|
| 1951 | 77 |
1.1%
|
|
| 1952 | 130 |
1.9%
|
|
| 1953 | 133 |
1.9%
|
|
| 1954 | 136 |
1.9%
|
|
| 1955 | 156 |
2.2%
|
|
| 1956 | 168 |
2.4%
|
|
| 1957 | 193 |
2.7%
|
|
| 1958 | 187 |
2.7%
|
|
| 1959 | 195 |
2.8%
|
|
| 1960 | 227 |
3.2%
|
|
| 1961 | 241 |
3.4%
|
|
| 1962 | 240 |
3.4%
|
|
| 1963 | 235 |
3.3%
|
|
| 1964 | 229 |
3.3%
|
|
| 1965 | 253 |
3.6%
|
|
| 1966 | 225 |
3.2%
|
|
| 1967 | 205 |
2.9%
|
|
| 1968 | 219 |
3.1%
|
|
| 1969 | 163 |
2.3%
|
|
| 1970 | 193 |
2.7%
|
|
| 1971 | 139 |
2%
|
|
| 1972 | 186 |
2.6%
|
|
| 1973 | 165 |
2.4%
|
|
| 1974 | 194 |
2.8%
|
|
| 1975 | 182 |
2.6%
|
|
| 1976 | 196 |
2.8%
|
|
| 1977 | 199 |
2.8%
|
|
| 1978 | 203 |
2.9%
|
|
| 1979 | 195 |
2.8%
|
|
| 1980 | 217 |
3.1%
|
|
| 1981 | 249 |
3.5%
|
|
| 1982 | 263 |
3.7%
|
|
| 1983 | 270 |
3.8%
|
|
| 1984 | 283 |
4%
|
|
| 1985 | 189 |
2.7%
|
|
| 9997 | Missing | 0 |
0%
|
| 9999 | Don't know | 65 |
0.9%
|