| Value |
Category |
| 1953 |
1953 |
| 1954 |
1954 |
| 1955 |
1955 |
| 1956 |
1956 |
| 1957 |
1957 |
| 1958 |
1958 |
| 1959 |
1959 |
| 1960 |
1960 |
| 1961 |
1961 |
| 1962 |
1962 |
| 1963 |
1963 |
| 1964 |
1964 |
| 1965 |
1965 |
| 1966 |
1966 |
| 1967 |
1967 |
| 1968 |
1968 |
| 1969 |
1969 |
| 1970 |
1970 |
| 1971 |
1971 |
| 1972 |
1972 |
| 1973 |
1973 |
| 1974 |
1974 |
| 1975 |
1975 |
| 1976 |
1976 |
| 1977 |
1977 |
| 1978 |
1978 |
| 1979 |
1979 |
| 1980 |
1980 |
| 1981 |
1981 |
| 1982 |
1982 |
| 1983 |
1983 |
| 1984 |
1984 |
| 1985 |
1985 |
| 1986 |
1986 |
| 1987 |
1987 |
| 1988 |
1988 |
| 1989 |
1989 |
| 1990 |
1990 |
| 1991 |
1991 |
| 1992 |
1992 |
| 1993 |
1993 |
| 1994 |
1994 |
| 1995 |
1995 |
| 1996 |
1996 |
| 1997 |
1997 |
| 9999 |
NIU (not in universe) |
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.