| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 11 |
5.6%
|
| -7 | Does not apply (spontaneous) | 1 |
0.5%
|
| 0 | Less than one day | 9 |
4.6%
|
| 1 | 9 |
4.6%
|
|
| 2 | 39 |
19.8%
|
|
| 3 | 32 |
16.2%
|
|
| 4 | 20 |
10.2%
|
|
| 5 | 10 |
5.1%
|
|
| 6 | 5 |
2.5%
|
|
| 7 | 17 |
8.6%
|
|
| 8 | 6 |
3%
|
|
| 9 | 2 |
1%
|
|
| 10 | 15 |
7.6%
|
|
| 11 | 1 |
0.5%
|
|
| 12 | 2 |
1%
|
|
| 13 | 1 |
0.5%
|
|
| 14 | 9 |
4.6%
|
|
| 15 | 3 |
1.5%
|
|
| 20 | 1 |
0.5%
|
|
| 21 | 2 |
1%
|
|
| 45 | 2 |
1%
|
|
| Sysmiss | 448 |