| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
2.9%
|
| 1 | One month or less | 7 |
6.8%
|
| 2 | 10 |
9.7%
|
|
| 3 | 28 |
27.2%
|
|
| 4 | 4 |
3.9%
|
|
| 5 | 4 |
3.9%
|
|
| 6 | 30 |
29.1%
|
|
| 9 | 2 |
1.9%
|
|
| 10 | 3 |
2.9%
|
|
| 11 | 1 |
1%
|
|
| 12 | 11 |
10.7%
|
|
| Sysmiss | 258 |