| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 13 |
14.3%
|
| 1 | One month or less | 3 |
3.3%
|
| 2 | 5 |
5.5%
|
|
| 3 | 9 |
9.9%
|
|
| 4 | 15 |
16.5%
|
|
| 5 | 8 |
8.8%
|
|
| 6 | 19 |
20.9%
|
|
| 7 | 7 |
7.7%
|
|
| 8 | 4 |
4.4%
|
|
| 9 | 2 |
2.2%
|
|
| 10 | 1 |
1.1%
|
|
| 12 | 5 |
5.5%
|
|
| Sysmiss | 383 |