| Age (years) | Male | Female | ||
| Sample | Census estimates | Sample | Census estimates | |
| 40–49 | 600 (54%) | 3855 (44%) | 649 (59%) | 3963 (43%) |
| 50–59 | 302 (27%) | 2528 (29%) | 226 (20%) | 2711 (29%) |
| 60–69 | 139 (12%) | 1496 (17%) | 132 (12%) | 1657 (18%) |
| ⩾70 | 75 (7%) | 817 (9%) | 92 (8%) | 973 (10%) |
| Total | 1116 | 8696 | 1099 | 9304 |