| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 15 |
14.3%
|
| 1 | One month or less | 24 |
22.9%
|
| 2 | 12 |
11.4%
|
|
| 3 | 19 |
18.1%
|
|
| 4 | 4 |
3.8%
|
|
| 5 | 4 |
3.8%
|
|
| 6 | 14 |
13.3%
|
|
| 7 | 1 |
1%
|
|
| 8 | 2 |
1.9%
|
|
| 9 | 1 |
1%
|
|
| 10 | 1 |
1%
|
|
| 11 | 1 |
1%
|
|
| 12 | 7 |
6.7%
|
|
| Sysmiss | 202 |