| Value |
Category |
| 1 |
<1975 |
| 2 |
1975-1980 |
| 3 |
1981-985 |
| 4 |
1986-1990 |
| 5 |
1991-1995 |
| 6 |
1996-2000 |
| 7 |
2001-2005 |
| 8 |
2006 |
| 9 |
9999 |
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.