| Frequency | Percent | Valid Percent | Cumulative Percent | |
| Valid 20 years and below | 76 | 20.1 | 20.1 | 20.1 |
| 21 to 30 years | 152 | 40.1 | 40.1 | 60.2 |
| 31 to 40 years | 151 | 39.8 | 39.8 | 100 |
| Total | 379 | 100 | 100 |