| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
9.5%
|
| 1 | One hour or less | 10 |
47.6%
|
| 2 | 2 |
9.5%
|
|
| 3 | 1 |
4.8%
|
|
| 5 | 1 |
4.8%
|
|
| 6 | 1 |
4.8%
|
|
| 8 | 1 |
4.8%
|
|
| 12 | 1 |
4.8%
|
|
| 24 | 1 |
4.8%
|
|
| 120 | 1 |
4.8%
|
|
| Sysmiss | 1302 |