| Value |
Category |
| 1939 |
|
| 1954 |
|
| 1958 |
|
| 1959 |
|
| 1962 |
|
| 1964 |
|
| 1965 |
|
| 1967 |
|
| 1968 |
|
| 1969 |
|
| 1972 |
|
| 1973 |
|
| 1974 |
|
| 1976 |
|
| 1977 |
|
| 1978 |
|
| 1979 |
|
| 1980 |
|
| 1982 |
|
| 1984 |
|
| 1986 |
|
| 1987 |
|
| 1990 |
|
| Sysmiss |
|
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.