| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 9 |
11.7%
|
| -7 | Does not apply (spontaneous) | 2 |
2.6%
|
| 0 | Less than one day | 4 |
5.2%
|
| 1 | 1 |
1.3%
|
|
| 2 | 5 |
6.5%
|
|
| 3 | 10 |
13%
|
|
| 4 | 5 |
6.5%
|
|
| 5 | 8 |
10.4%
|
|
| 6 | 1 |
1.3%
|
|
| 7 | 7 |
9.1%
|
|
| 14 | 8 |
10.4%
|
|
| 15 | 1 |
1.3%
|
|
| 16 | 1 |
1.3%
|
|
| 20 | 3 |
3.9%
|
|
| 25 | 1 |
1.3%
|
|
| 30 | 4 |
5.2%
|
|
| 31 | 1 |
1.3%
|
|
| 45 | 1 |
1.3%
|
|
| 60 | 4 |
5.2%
|
|
| 90 | 1 |
1.3%
|
|
| Sysmiss | 925 |