| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | Less than one day | 1 |
2%
|
| 1 | 3 |
6%
|
|
| 2 | 1 |
2%
|
|
| 3 | 3 |
6%
|
|
| 4 | 1 |
2%
|
|
| 5 | 2 |
4%
|
|
| 7 | 10 |
20%
|
|
| 14 | 5 |
10%
|
|
| 15 | 2 |
4%
|
|
| 21 | 8 |
16%
|
|
| 30 | 6 |
12%
|
|
| 37 | 1 |
2%
|
|
| 40 | 3 |
6%
|
|
| 45 | 1 |
2%
|
|
| 60 | 2 |
4%
|
|
| 90 | 1 |
2%
|
|
| Sysmiss | 112 |