| Characteristics | Frequency (N = 57) |
| Age |
|
| Range | 23 - 57 years |
| Mean | 39 years |
| Sex |
|
| Male | 73.7% |
| Female | 26.3% |
| Experience (Years) |
|
| <5 | 14% |
| 5 - 15 | 26.4% |
| 15 - 20 | 35% |
| >20 | 24.6% |