| Value | Category | Cases | |
|---|---|---|---|
| 1943 | 1 |
0.3%
|
|
| 1948 | 1 |
0.3%
|
|
| 1949 | 1 |
0.3%
|
|
| 1953 | 2 |
0.7%
|
|
| 1955 | 1 |
0.3%
|
|
| 1956 | 1 |
0.3%
|
|
| 1957 | 1 |
0.3%
|
|
| 1960 | 1 |
0.3%
|
|
| 1961 | 2 |
0.7%
|
|
| 1962 | 2 |
0.7%
|
|
| 1963 | 9 |
3%
|
|
| 1964 | 9 |
3%
|
|
| 1965 | 14 |
4.7%
|
|
| 1966 | 6 |
2%
|
|
| 1967 | 7 |
2.3%
|
|
| 1968 | 6 |
2%
|
|
| 1969 | 3 |
1%
|
|
| 1970 | 9 |
3%
|
|
| 1971 | 5 |
1.7%
|
|
| 1972 | 9 |
3%
|
|
| 1973 | 13 |
4.3%
|
|
| 1974 | 10 |
3.3%
|
|
| 1975 | 11 |
3.7%
|
|
| 1976 | 10 |
3.3%
|
|
| 1977 | 15 |
5%
|
|
| 1978 | 12 |
4%
|
|
| 1979 | 11 |
3.7%
|
|
| 1980 | 14 |
4.7%
|
|
| 1981 | 8 |
2.7%
|
|
| 1982 | 14 |
4.7%
|
|
| 1983 | 15 |
5%
|
|
| 1984 | 18 |
6%
|
|
| 1985 | 12 |
4%
|
|
| 1986 | 9 |
3%
|
|
| 1987 | 8 |
2.7%
|
|
| 1988 | 5 |
1.7%
|
|
| 1989 | 7 |
2.3%
|
|
| 1990 | 5 |
1.7%
|
|
| 1991 | 3 |
1%
|
|
| 1992 | 2 |
0.7%
|
|
| 1993 | 2 |
0.7%
|
|
| 1994 | 1 |
0.3%
|
|
| 1995 | 1 |
0.3%
|
|
| 9998 | 9998. Don't know | 4 |
1.3%
|
| 9999 | 9999. Missing | 0 |
0%
|
| Sysmiss | 46 |