| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 8 |
10.4%
|
| 1 | One month or less | 4 |
5.2%
|
| 2 | 12 |
15.6%
|
|
| 3 | 22 |
28.6%
|
|
| 4 | 7 |
9.1%
|
|
| 5 | 1 |
1.3%
|
|
| 6 | 6 |
7.8%
|
|
| 7 | 1 |
1.3%
|
|
| 8 | 1 |
1.3%
|
|
| 9 | 1 |
1.3%
|
|
| 12 | 14 |
18.2%
|
|
| Sysmiss | 281 |