| Age (year) | Number | Percentage |
| ≤40 | 3 | 10 |
| 41 - 50 | 3 | 10 |
| 51 - 60 | 3 | 10 |
| 61 - 70 | 8 | 26.67 |
| 71 - 80 | 10 | 33.33 |
| >80 | 3 | 10 |
| Total | 30 | 100 |