| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 6 |
6.7%
|
| 0 | Less than one day | 17 |
18.9%
|
| 1 | 15 |
16.7%
|
|
| 2 | 23 |
25.6%
|
|
| 3 | 9 |
10%
|
|
| 4 | 1 |
1.1%
|
|
| 5 | 1 |
1.1%
|
|
| 7 | 6 |
6.7%
|
|
| 10 | 3 |
3.3%
|
|
| 12 | 2 |
2.2%
|
|
| 15 | 2 |
2.2%
|
|
| 28 | 1 |
1.1%
|
|
| 30 | 1 |
1.1%
|
|
| 38 | 1 |
1.1%
|
|
| 67 | 1 |
1.1%
|
|
| 94 | 1 |
1.1%
|
|
| Sysmiss | 215 |