| Experience | Frequency | Percentage |
| 1 - 5 years | 11 | 23.40% |
| 5 - 10 years | 9 | 19.15% |
| 11 - 15 years | 9 | 19.15% |
| more than 15 years | 18 | 38.30% |
| Total | 47 | 100.00% |