| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
12.5%
|
| 1 | Less than one hour | 4 |
12.5%
|
| 3 | 5 |
15.6%
|
|
| 4 | 3 |
9.4%
|
|
| 5 | 2 |
6.3%
|
|
| 6 | 2 |
6.3%
|
|
| 8 | 3 |
9.4%
|
|
| 10 | 1 |
3.1%
|
|
| 12 | 3 |
9.4%
|
|
| 24 | 4 |
12.5%
|
|
| 48 | 1 |
3.1%
|
|
| Sysmiss | 955 |