| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 11 |
10.5%
|
| 1 | One month or less | 32 |
30.5%
|
| 2 | 12 |
11.4%
|
|
| 3 | 11 |
10.5%
|
|
| 4 | 5 |
4.8%
|
|
| 5 | 3 |
2.9%
|
|
| 6 | 11 |
10.5%
|
|
| 7 | 6 |
5.7%
|
|
| 8 | 7 |
6.7%
|
|
| 10 | 1 |
1%
|
|
| 12 | 6 |
5.7%
|
|
| Sysmiss | 507 |