| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | One hour or less | 20 |
37%
|
| 2 | 8 |
14.8%
|
|
| 3 | 3 |
5.6%
|
|
| 4 | 3 |
5.6%
|
|
| 5 | 5 |
9.3%
|
|
| 6 | 5 |
9.3%
|
|
| 7 | 3 |
5.6%
|
|
| 9 | 1 |
1.9%
|
|
| 10 | 2 |
3.7%
|
|
| 12 | 1 |
1.9%
|
|
| 24 | 3 |
5.6%
|
|
| Sysmiss | 326 |