| Levels | Frequency | Percentage |
| Less than 15 years old | 55 | 27.5 |
| 15 to 20 years old | 25 | 12.5 |
| 20 to 25 years old | 61 | 30.5 |
| 25 years old and higher | 59 | 29.5 |
| Total | 200 | 100 |