| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
8.8%
|
| 1 | One hour or less | 4 |
11.8%
|
| 2 | 4 |
11.8%
|
|
| 3 | 3 |
8.8%
|
|
| 4 | 1 |
2.9%
|
|
| 5 | 5 |
14.7%
|
|
| 8 | 6 |
17.6%
|
|
| 12 | 3 |
8.8%
|
|
| 24 | 4 |
11.8%
|
|
| 48 | 1 |
2.9%
|
|
| Sysmiss | 1412 |