| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Less than one day | 1 |
1.1%
|
| 7 | 2 |
2.2%
|
|
| 14 | 2 |
2.2%
|
|
| 15 | 2 |
2.2%
|
|
| 20 | 1 |
1.1%
|
|
| 21 | 12 |
12.9%
|
|
| 30 | 40 |
43%
|
|
| 40 | 1 |
1.1%
|
|
| 45 | 1 |
1.1%
|
|
| 48 | 1 |
1.1%
|
|
| 60 | 10 |
10.8%
|
|
| 75 | 1 |
1.1%
|
|
| 90 | 13 |
14%
|
|
| 120 | 4 |
4.3%
|
|
| 150 | 1 |
1.1%
|
|
| 180 | 1 |
1.1%
|
|
| Sysmiss | 530 |