| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 19 |
8.6%
|
| 1 | One month or less | 62 |
28.1%
|
| 2 | 8 |
3.6%
|
|
| 3 | 16 |
7.2%
|
|
| 4 | 13 |
5.9%
|
|
| 5 | 24 |
10.9%
|
|
| 6 | 30 |
13.6%
|
|
| 7 | 9 |
4.1%
|
|
| 8 | 14 |
6.3%
|
|
| 10 | 7 |
3.2%
|
|
| 11 | 1 |
0.5%
|
|
| 12 | 18 |
8.1%
|
|
| Sysmiss | 798 |