| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | Less than one day | 0 |
0%
|
| 2 | 1 |
0.7%
|
|
| 4 | 1 |
0.7%
|
|
| 5 | 4 |
2.8%
|
|
| 7 | 2 |
1.4%
|
|
| 9 | 1 |
0.7%
|
|
| 10 | 6 |
4.2%
|
|
| 11 | 1 |
0.7%
|
|
| 14 | 2 |
1.4%
|
|
| 15 | 40 |
28.2%
|
|
| 18 | 1 |
0.7%
|
|
| 20 | 28 |
19.7%
|
|
| 21 | 2 |
1.4%
|
|
| 22 | 10 |
7%
|
|
| 25 | 6 |
4.2%
|
|
| 30 | 24 |
16.9%
|
|
| 33 | 3 |
2.1%
|
|
| 35 | 4 |
2.8%
|
|
| 40 | 2 |
1.4%
|
|
| 45 | 1 |
0.7%
|
|
| 55 | 1 |
0.7%
|
|
| 60 | 1 |
0.7%
|
|
| 70 | 1 |
0.7%
|
|
| Sysmiss | 377 |