|
| Frequency | Percent | Valid Percent | Cumulative Percent | |
| Valid | under 20 | 4 | 3.1 | 3.1 | 3.1 |
| 21 - 40 | 29 | 22.7 | 22.7 | 25.8 | |
| 41 - 60 | 32 | 25.0 | 25.0 | 50.8 | |
| 61 - 80 | 52 | 40.6 | 40.6 | 91.4 | |
| above 80 | 11 | 8.6 | 8.6 | 100.0 | |
| Total | 128 | 100.0 | 100.0 |
| |