| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 15 minutes | 8 |
3.3%
|
| 2 | 15 to 30 minutes | 16 |
6.7%
|
| 3 | 30 to 60 minutes | 53 |
22.2%
|
| 4 | 1 hour to 1 hour and a half | 54 |
22.6%
|
| 5 | 1 hour and a half to 2 hours | 54 |
22.6%
|
| 6 | 2 hours to 2 hours and a half | 22 |
9.2%
|
| 7 | More than 2 hours and a half | 32 |
13.4%
|
| Sysmiss | 12 |