| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
1%
|
| -7 | Does not apply (spontaneous) | 4 |
4%
|
| 0 | Less than one day | 1 |
1%
|
| 1 | 1 |
1%
|
|
| 2 | 5 |
5%
|
|
| 3 | 8 |
7.9%
|
|
| 4 | 4 |
4%
|
|
| 5 | 10 |
9.9%
|
|
| 6 | 1 |
1%
|
|
| 7 | 12 |
11.9%
|
|
| 8 | 8 |
7.9%
|
|
| 9 | 3 |
3%
|
|
| 10 | 8 |
7.9%
|
|
| 14 | 2 |
2%
|
|
| 15 | 10 |
9.9%
|
|
| 20 | 2 |
2%
|
|
| 22 | 6 |
5.9%
|
|
| 25 | 1 |
1%
|
|
| 30 | 8 |
7.9%
|
|
| 45 | 2 |
2%
|
|
| 48 | 1 |
1%
|
|
| 60 | 2 |
2%
|
|
| 70 | 1 |
1%
|
|
| Sysmiss | 256 |