| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 6 |
8.3%
|
| 1 | One month or less | 24 |
33.3%
|
| 2 | 9 |
12.5%
|
|
| 3 | 8 |
11.1%
|
|
| 4 | 1 |
1.4%
|
|
| 5 | 1 |
1.4%
|
|
| 6 | 11 |
15.3%
|
|
| 7 | 1 |
1.4%
|
|
| 8 | 1 |
1.4%
|
|
| 9 | 1 |
1.4%
|
|
| 10 | 3 |
4.2%
|
|
| 12 | 6 |
8.3%
|
|
| Sysmiss | 281 |