| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 |
7.1%
|
| 0 | Less than one day | 0 |
0%
|
| 2 | 1 |
1%
|
|
| 3 | 5 |
5.1%
|
|
| 4 | 7 |
7.1%
|
|
| 5 | 4 |
4%
|
|
| 6 | 4 |
4%
|
|
| 7 | 7 |
7.1%
|
|
| 8 | 4 |
4%
|
|
| 9 | 8 |
8.1%
|
|
| 10 | 5 |
5.1%
|
|
| 11 | 4 |
4%
|
|
| 12 | 5 |
5.1%
|
|
| 13 | 5 |
5.1%
|
|
| 14 | 5 |
5.1%
|
|
| 15 | 7 |
7.1%
|
|
| 16 | 4 |
4%
|
|
| 18 | 5 |
5.1%
|
|
| 19 | 1 |
1%
|
|
| 20 | 4 |
4%
|
|
| 21 | 1 |
1%
|
|
| 22 | 1 |
1%
|
|
| 23 | 1 |
1%
|
|
| 25 | 1 |
1%
|
|
| 28 | 1 |
1%
|
|
| 30 | 1 |
1%
|
|
| 32 | 1 |
1%
|
|
| Sysmiss | 914 |