| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 22 |
19.5%
|
| -7 | Does not apply (spontaneous) | 1 |
0.9%
|
| 0 | Less than one day | 2 |
1.8%
|
| 1 | 5 |
4.4%
|
|
| 2 | 15 |
13.3%
|
|
| 3 | 17 |
15%
|
|
| 4 | 14 |
12.4%
|
|
| 5 | 16 |
14.2%
|
|
| 6 | 5 |
4.4%
|
|
| 7 | 4 |
3.5%
|
|
| 8 | 2 |
1.8%
|
|
| 9 | 2 |
1.8%
|
|
| 10 | 4 |
3.5%
|
|
| 15 | 2 |
1.8%
|
|
| 20 | 1 |
0.9%
|
|
| 25 | 1 |
0.9%
|
|
| Sysmiss | 485 |