| Value |
Category |
| 1 |
Before 1946 |
| 2 |
1946 – 1960 |
| 3 |
1961 – 1980 |
| 4 |
1981 - 1995 |
| 5 |
1996 and after |
| 9 |
N/A |
| 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.