| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
5%
|
| -7 | Does not apply (spontaneous) | 1 |
1%
|
| 0 | Less than one day | 0 |
0%
|
| 2 | 9 |
9%
|
|
| 3 | 5 |
5%
|
|
| 4 | 4 |
4%
|
|
| 5 | 8 |
8%
|
|
| 6 | 7 |
7%
|
|
| 7 | 7 |
7%
|
|
| 8 | 4 |
4%
|
|
| 9 | 3 |
3%
|
|
| 10 | 15 |
15%
|
|
| 11 | 2 |
2%
|
|
| 12 | 8 |
8%
|
|
| 13 | 2 |
2%
|
|
| 14 | 2 |
2%
|
|
| 15 | 4 |
4%
|
|
| 16 | 3 |
3%
|
|
| 18 | 2 |
2%
|
|
| 19 | 1 |
1%
|
|
| 20 | 5 |
5%
|
|
| 22 | 1 |
1%
|
|
| 27 | 1 |
1%
|
|
| 30 | 1 |
1%
|
|
| Sysmiss | 913 |