| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 1 hour | 1973 |
77%
|
| 2 | Between 1 -23 hours | 407 |
15.9%
|
| 3 | 24 hours or more | 147 |
5.7%
|
| 4 | Don't remember | 36 |
1.4%
|
| Sysmiss | 4173 |