| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 6 |
5.9%
|
| 0 | Less than one day | 9 |
8.8%
|
| 1 | 13 |
12.7%
|
|
| 2 | 22 |
21.6%
|
|
| 3 | 15 |
14.7%
|
|
| 4 | 9 |
8.8%
|
|
| 5 | 11 |
10.8%
|
|
| 6 | 1 |
1%
|
|
| 8 | 4 |
3.9%
|
|
| 10 | 2 |
2%
|
|
| 14 | 1 |
1%
|
|
| 15 | 1 |
1%
|
|
| 20 | 2 |
2%
|
|
| 22 | 1 |
1%
|
|
| 30 | 4 |
3.9%
|
|
| 90 | 1 |
1%
|
|
| Sysmiss | 627 |