| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 6 |
6.7%
|
| 1 | One month or less | 11 |
12.2%
|
| 2 | 6 |
6.7%
|
|
| 3 | 27 |
30%
|
|
| 4 | 5 |
5.6%
|
|
| 5 | 7 |
7.8%
|
|
| 6 | 22 |
24.4%
|
|
| 8 | 5 |
5.6%
|
|
| 12 | 1 |
1.1%
|
|
| Sysmiss | 272 |