| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
2.3%
|
| 0 | Less than 1 hour | 5 |
11.4%
|
| 1 | 10 |
22.7%
|
|
| 2 | 6 |
13.6%
|
|
| 3 | 6 |
13.6%
|
|
| 4 | 6 |
13.6%
|
|
| 5 | 5 |
11.4%
|
|
| 6 | 2 |
4.5%
|
|
| 10 | 1 |
2.3%
|
|
| 24 | 1 |
2.3%
|
|
| 36 | 1 |
2.3%
|
|
| Sysmiss | 112 |