| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 20 |
14.3%
|
| 1 | One month or less | 18 |
12.9%
|
| 2 | 30 |
21.4%
|
|
| 3 | 35 |
25%
|
|
| 4 | 5 |
3.6%
|
|
| 5 | 1 |
0.7%
|
|
| 6 | 22 |
15.7%
|
|
| 8 | 4 |
2.9%
|
|
| 10 | 1 |
0.7%
|
|
| 11 | 1 |
0.7%
|
|
| 12 | 3 |
2.1%
|
|
| Sysmiss | 1229 |