| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 10 |
2.7%
|
| 1 | One month or less | 17 |
4.6%
|
| 2 | 24 |
6.5%
|
|
| 3 | 107 |
29.1%
|
|
| 4 | 32 |
8.7%
|
|
| 5 | 21 |
5.7%
|
|
| 6 | 104 |
28.3%
|
|
| 7 | 6 |
1.6%
|
|
| 8 | 7 |
1.9%
|
|
| 9 | 10 |
2.7%
|
|
| 12 | 30 |
8.2%
|
|
| Sysmiss | 1701 |