| More than 16 hours per month | 6 % |
| Between 8 and 16 hours | 9 % |
| About 8 hours per month | 8 % |
| Between 4 and 8 hours | 14 % |
| Less than 4 hours per month | 62 % |
| Total | 1182 |
| More than 16 hours per month | 6 % |
| Between 8 and 16 hours | 9 % |
| About 8 hours per month | 8 % |
| Between 4 and 8 hours | 14 % |
| Less than 4 hours per month | 62 % |
| Total | 1182 |