| No off-duty work is allowed | 20 % |
| 1 to 12 | 4 % |
| 13 to 24 | 12 % |
| 25 to 36 | 19 % |
| 37 or more | 46 % |
| Total | 135 |
| No off-duty work is allowed | 20 % |
| 1 to 12 | 4 % |
| 13 to 24 | 12 % |
| 25 to 36 | 19 % |
| 37 or more | 46 % |
| Total | 135 |