| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 11 |
8.4%
|
| 1 | One month or less | 40 |
30.5%
|
| 2 | 17 |
13%
|
|
| 3 | 22 |
16.8%
|
|
| 4 | 12 |
9.2%
|
|
| 5 | 5 |
3.8%
|
|
| 6 | 15 |
11.5%
|
|
| 7 | 2 |
1.5%
|
|
| 8 | 1 |
0.8%
|
|
| 10 | 2 |
1.5%
|
|
| 12 | 4 |
3.1%
|
|
| Sysmiss | 1442 |