| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
2.4%
|
| 1 | One month or less | 14 |
16.5%
|
| 2 | 15 |
17.6%
|
|
| 3 | 23 |
27.1%
|
|
| 4 | 10 |
11.8%
|
|
| 5 | 2 |
2.4%
|
|
| 6 | 7 |
8.2%
|
|
| 7 | 2 |
2.4%
|
|
| 8 | 3 |
3.5%
|
|
| 10 | 1 |
1.2%
|
|
| 12 | 6 |
7.1%
|
|
| Sysmiss | 266 |