| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | One month or less | 30 |
47.6%
|
| 2 | 5 |
7.9%
|
|
| 3 | 13 |
20.6%
|
|
| 4 | 11 |
17.5%
|
|
| 5 | 2 |
3.2%
|
|
| 6 | 2 |
3.2%
|
|
| Sysmiss | 187 |