| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than an hour | 845 |
14.3%
|
| 2 | An hour - less than an hour and a half | 429 |
7.2%
|
| 3 | Than an hour and a half - two hours | 159 |
2.7%
|
| 4 | More than two hours | 54 |
0.9%
|
| Sysmiss | 4435 |