| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. 2 hours | 568 |
13%
|
| 2 | 2. 2.5 hours | 356 |
8.1%
|
| 3 | 3. 3 hours | 1981 |
45.2%
|
| 4 | 4. 3.5 hours | 299 |
6.8%
|
| 5 | 5. 4 hours | 454 |
10.4%
|
| 6 | 6. 4.5 hours | 180 |
4.1%
|
| 7 | 7. 5 hours or more | 540 |
12.3%
|
| Sysmiss | 160 |