| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
8.3%
|
| 1 | One month or less | 2 |
8.3%
|
| 3 | 6 |
25%
|
|
| 4 | 2 |
8.3%
|
|
| 5 | 1 |
4.2%
|
|
| 6 | 4 |
16.7%
|
|
| 7 | 1 |
4.2%
|
|
| 9 | 1 |
4.2%
|
|
| 11 | 1 |
4.2%
|
|
| 12 | 4 |
16.7%
|
|
| Sysmiss | 686 |