| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 12 |
7.5%
|
| 1 | One month or less | 33 |
20.6%
|
| 2 | 17 |
10.6%
|
|
| 3 | 34 |
21.3%
|
|
| 4 | 22 |
13.8%
|
|
| 5 | 8 |
5%
|
|
| 6 | 19 |
11.9%
|
|
| 7 | 2 |
1.3%
|
|
| 8 | 8 |
5%
|
|
| 9 | 1 |
0.6%
|
|
| 10 | 2 |
1.3%
|
|
| 12 | 2 |
1.3%
|
|
| Sysmiss | 1177 |