| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 20 |
7.2%
|
| 1 | One month or less | 54 |
19.4%
|
| 2 | 35 |
12.6%
|
|
| 3 | 62 |
22.3%
|
|
| 4 | 23 |
8.3%
|
|
| 5 | 19 |
6.8%
|
|
| 6 | 33 |
11.9%
|
|
| 7 | 4 |
1.4%
|
|
| 8 | 14 |
5%
|
|
| 9 | 6 |
2.2%
|
|
| 10 | 3 |
1.1%
|
|
| 11 | 1 |
0.4%
|
|
| 12 | 4 |
1.4%
|
|
| Sysmiss | 961 |