| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
13.5%
|
| 1 | One hour or less | 13 |
35.1%
|
| 2 | 2 |
5.4%
|
|
| 3 | 2 |
5.4%
|
|
| 4 | 1 |
2.7%
|
|
| 5 | 2 |
5.4%
|
|
| 6 | 2 |
5.4%
|
|
| 8 | 1 |
2.7%
|
|
| 12 | 4 |
10.8%
|
|
| 18 | 1 |
2.7%
|
|
| 24 | 2 |
5.4%
|
|
| 48 | 1 |
2.7%
|
|
| 50 | 1 |
2.7%
|
|
| Sysmiss | 341 |