| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 8 |
13.3%
|
| 0 | Less than one day | 6 |
10%
|
| 1 | 4 |
6.7%
|
|
| 2 | 3 |
5%
|
|
| 3 | 7 |
11.7%
|
|
| 5 | 3 |
5%
|
|
| 6 | 2 |
3.3%
|
|
| 7 | 5 |
8.3%
|
|
| 10 | 7 |
11.7%
|
|
| 12 | 2 |
3.3%
|
|
| 14 | 1 |
1.7%
|
|
| 15 | 3 |
5%
|
|
| 16 | 1 |
1.7%
|
|
| 20 | 1 |
1.7%
|
|
| 21 | 1 |
1.7%
|
|
| 23 | 1 |
1.7%
|
|
| 25 | 1 |
1.7%
|
|
| 30 | 1 |
1.7%
|
|
| 45 | 1 |
1.7%
|
|
| 60 | 1 |
1.7%
|
|
| 90 | 1 |
1.7%
|
|
| Sysmiss | 308 |