| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
3.6%
|
| 1 | One hour or less | 9 |
32.1%
|
| 2 | 4 |
14.3%
|
|
| 3 | 1 |
3.6%
|
|
| 5 | 2 |
7.1%
|
|
| 8 | 1 |
3.6%
|
|
| 12 | 2 |
7.1%
|
|
| 15 | 1 |
3.6%
|
|
| 24 | 3 |
10.7%
|
|
| 30 | 2 |
7.1%
|
|
| 48 | 1 |
3.6%
|
|
| 72 | 1 |
3.6%
|
|
| Sysmiss | 336 |