| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | Less than one day | 1 |
1.6%
|
| 1 | 1 |
1.6%
|
|
| 2 | 4 |
6.5%
|
|
| 3 | 2 |
3.2%
|
|
| 5 | 1 |
1.6%
|
|
| 10 | 3 |
4.8%
|
|
| 12 | 1 |
1.6%
|
|
| 13 | 1 |
1.6%
|
|
| 14 | 3 |
4.8%
|
|
| 15 | 5 |
8.1%
|
|
| 20 | 6 |
9.7%
|
|
| 21 | 1 |
1.6%
|
|
| 25 | 3 |
4.8%
|
|
| 30 | 15 |
24.2%
|
|
| 31 | 2 |
3.2%
|
|
| 40 | 3 |
4.8%
|
|
| 60 | 3 |
4.8%
|
|
| 70 | 2 |
3.2%
|
|
| 75 | 2 |
3.2%
|
|
| 90 | 1 |
1.6%
|
|
| 120 | 1 |
1.6%
|
|
| 180 | 1 |
1.6%
|
|
| Sysmiss | 302 |