| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
4.6%
|
| 1 | One month or less | 11 |
12.6%
|
| 2 | 14 |
16.1%
|
|
| 3 | 27 |
31%
|
|
| 4 | 2 |
2.3%
|
|
| 5 | 6 |
6.9%
|
|
| 6 | 7 |
8%
|
|
| 7 | 1 |
1.1%
|
|
| 8 | 2 |
2.3%
|
|
| 9 | 1 |
1.1%
|
|
| 11 | 2 |
2.3%
|
|
| 12 | 10 |
11.5%
|
|
| Sysmiss | 271 |