| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 |
5.6%
|
| 1 | One month or less | 37 |
29.6%
|
| 2 | 11 |
8.8%
|
|
| 3 | 22 |
17.6%
|
|
| 4 | 13 |
10.4%
|
|
| 5 | 2 |
1.6%
|
|
| 6 | 9 |
7.2%
|
|
| 7 | 1 |
0.8%
|
|
| 8 | 5 |
4%
|
|
| 9 | 2 |
1.6%
|
|
| 10 | 2 |
1.6%
|
|
| 11 | 2 |
1.6%
|
|
| 12 | 12 |
9.6%
|
|
| Sysmiss | 1291 |