| Age group (years) | Male | Female | Total | |||
| No | % | No | % | No | % | |
| Under 40 | 10 | 66.6 | 5 | 33.4 | 15 | 7.2 |
| 40 - 60 | 60 | 75 | 20 | 25 | 80 | 38.6 |
| Over 60 | 80 | 71.4 | 32 | 28.6 | 112 | 54.2 |
| Total | 150 | 72.5 | 57 | 27.5 | 207 | 100 |