| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 23 |
8.3%
|
| 1 | One month or less | 40 |
14.5%
|
| 2 | 35 |
12.7%
|
|
| 3 | 54 |
19.6%
|
|
| 4 | 10 |
3.6%
|
|
| 5 | 13 |
4.7%
|
|
| 6 | 20 |
7.2%
|
|
| 7 | 2 |
0.7%
|
|
| 8 | 13 |
4.7%
|
|
| 9 | 5 |
1.8%
|
|
| 10 | 9 |
3.3%
|
|
| 11 | 2 |
0.7%
|
|
| 12 | 50 |
18.1%
|
|
| Sysmiss | 752 |