Value |
Category |
1 |
1920s |
2 |
1930s |
3 |
1940s |
4 |
1950s |
5 |
1960s |
6 |
1970-74 |
7 |
1975-79 |
8 |
1980-84 |
9 |
1985-89 |
10 |
since 1990 |
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.