| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 5 hours | 116 |
34.5%
|
| 2 | From 6 to 10 hours | 79 |
23.5%
|
| 3 | From 11 to 20 hours | 33 |
9.8%
|
| 4 | From 21 to 40 hours | 45 |
13.4%
|
| 5 | More than 40 hours | 63 |
18.8%
|
| Sysmiss | 495 |