| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 16 |
10.9%
|
| 1 | One month or less | 22 |
15%
|
| 2 | 1 |
0.7%
|
|
| 3 | 33 |
22.4%
|
|
| 4 | 16 |
10.9%
|
|
| 5 | 3 |
2%
|
|
| 6 | 54 |
36.7%
|
|
| 8 | 2 |
1.4%
|
|
| Sysmiss | 1175 |