| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
2%
|
| 1 | One month or less | 51 |
25.2%
|
| 2 | 29 |
14.4%
|
|
| 3 | 32 |
15.8%
|
|
| 4 | 16 |
7.9%
|
|
| 5 | 17 |
8.4%
|
|
| 6 | 17 |
8.4%
|
|
| 7 | 3 |
1.5%
|
|
| 8 | 7 |
3.5%
|
|
| 9 | 3 |
1.5%
|
|
| 10 | 2 |
1%
|
|
| 11 | 3 |
1.5%
|
|
| 12 | 18 |
8.9%
|
|
| Sysmiss | 796 |