| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 6 |
4.9%
|
| 1 | One month or less | 33 |
27%
|
| 2 | 16 |
13.1%
|
|
| 3 | 17 |
13.9%
|
|
| 4 | 13 |
10.7%
|
|
| 5 | 9 |
7.4%
|
|
| 6 | 13 |
10.7%
|
|
| 7 | 3 |
2.5%
|
|
| 8 | 3 |
2.5%
|
|
| 9 | 2 |
1.6%
|
|
| 10 | 2 |
1.6%
|
|
| 12 | 5 |
4.1%
|
|
| Sysmiss | 886 |