| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | One month or less | 16 |
39%
|
| 3 | 6 |
14.6%
|
|
| 5 | 4 |
9.8%
|
|
| 6 | 7 |
17.1%
|
|
| 7 | 2 |
4.9%
|
|
| 8 | 2 |
4.9%
|
|
| 9 | 1 |
2.4%
|
|
| 10 | 2 |
4.9%
|
|
| 12 | 1 |
2.4%
|
|
| Sysmiss | 122 |