| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 19 |
21.3%
|
| 0 | Less than one day | 20 |
22.5%
|
| 1 | 11 |
12.4%
|
|
| 2 | 21 |
23.6%
|
|
| 3 | 9 |
10.1%
|
|
| 4 | 2 |
2.2%
|
|
| 5 | 1 |
1.1%
|
|
| 6 | 1 |
1.1%
|
|
| 10 | 4 |
4.5%
|
|
| 30 | 1 |
1.1%
|
|
| Sysmiss | 262 |