| Value |
Category |
| 1 |
Before 1918 |
| 2 |
1918 – 1945 |
| 3 |
1946 – 1960 |
| 4 |
1961 – 1970 |
| 5 |
1971 - 1980 |
| 6 |
1981 - 1990 |
| 7 |
1991 – 2000 |
| 8 |
2001 or later |
| 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.