| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 11 |
13.1%
|
| 1 | One month or less | 7 |
8.3%
|
| 2 | 14 |
16.7%
|
|
| 3 | 37 |
44%
|
|
| 4 | 5 |
6%
|
|
| 5 | 1 |
1.2%
|
|
| 6 | 6 |
7.1%
|
|
| 8 | 1 |
1.2%
|
|
| 10 | 2 |
2.4%
|
|
| Sysmiss | 187 |