| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | One month or less | 17 |
77.3%
|
| 2 | 1 |
4.5%
|
|
| 3 | 1 |
4.5%
|
|
| 5 | 1 |
4.5%
|
|
| 6 | 1 |
4.5%
|
|
| 12 | 1 |
4.5%
|
|
| Sysmiss | 89 |