| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
5.6%
|
| 1 | One hour or less | 6 |
33.3%
|
| 2 | 1 |
5.6%
|
|
| 3 | 1 |
5.6%
|
|
| 5 | 4 |
22.2%
|
|
| 6 | 1 |
5.6%
|
|
| 8 | 1 |
5.6%
|
|
| 13 | 1 |
5.6%
|
|
| 24 | 1 |
5.6%
|
|
| 180 | 1 |
5.6%
|
|
| Sysmiss | 563 |