| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than one hour | 1052 |
87.5%
|
| 2 | 1-23 hours | 113 |
9.4%
|
| 3 | +24 hours | 22 |
1.8%
|
| 4 | Don't know | 15 |
1.2%
|
| Sysmiss | 1538 |