| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
1.3%
|
| 1 | Less than one hour | 52 |
68.4%
|
| 2 | 10 |
13.2%
|
|
| 3 | 6 |
7.9%
|
|
| 4 | 1 |
1.3%
|
|
| 5 | 2 |
2.6%
|
|
| 10 | 1 |
1.3%
|
|
| 12 | 1 |
1.3%
|
|
| 24 | 2 |
2.6%
|
|
| Sysmiss | 943 |