| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | Less than one day | 0 |
0%
|
| 3 | 3 |
9.4%
|
|
| 4 | 6 |
18.8%
|
|
| 5 | 14 |
43.8%
|
|
| 6 | 4 |
12.5%
|
|
| 7 | 2 |
6.3%
|
|
| 10 | 1 |
3.1%
|
|
| 15 | 2 |
6.3%
|
|
| Sysmiss | 966 |