| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
3.1%
|
| 1 | One month or less | 3 |
4.7%
|
| 2 | 9 |
14.1%
|
|
| 3 | 16 |
25%
|
|
| 4 | 8 |
12.5%
|
|
| 5 | 3 |
4.7%
|
|
| 6 | 17 |
26.6%
|
|
| 8 | 1 |
1.6%
|
|
| 9 | 1 |
1.6%
|
|
| 10 | 1 |
1.6%
|
|
| 11 | 1 |
1.6%
|
|
| 12 | 2 |
3.1%
|
|
| Sysmiss | 438 |