| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
2.7%
|
| 1 | Less than one day | 3 |
4.1%
|
| 5 | 1 |
1.4%
|
|
| 8 | 1 |
1.4%
|
|
| 15 | 3 |
4.1%
|
|
| 20 | 2 |
2.7%
|
|
| 25 | 1 |
1.4%
|
|
| 30 | 23 |
31.1%
|
|
| 40 | 1 |
1.4%
|
|
| 45 | 4 |
5.4%
|
|
| 60 | 16 |
21.6%
|
|
| 90 | 10 |
13.5%
|
|
| 120 | 3 |
4.1%
|
|
| 150 | 1 |
1.4%
|
|
| 180 | 3 |
4.1%
|
|
| Sysmiss | 845 |