| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
3%
|
| 1 | One month or less | 0 |
0%
|
| 2 | 7 |
10.6%
|
|
| 3 | 24 |
36.4%
|
|
| 4 | 8 |
12.1%
|
|
| 5 | 8 |
12.1%
|
|
| 6 | 15 |
22.7%
|
|
| 7 | 2 |
3%
|
|
| Sysmiss | 706 |