| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 30 |
13.1%
|
| 1 | One month or less | 4 |
1.7%
|
| 2 | 8 |
3.5%
|
|
| 3 | 40 |
17.5%
|
|
| 4 | 35 |
15.3%
|
|
| 5 | 29 |
12.7%
|
|
| 6 | 43 |
18.8%
|
|
| 7 | 5 |
2.2%
|
|
| 8 | 10 |
4.4%
|
|
| 9 | 3 |
1.3%
|
|
| 10 | 8 |
3.5%
|
|
| 11 | 4 |
1.7%
|
|
| 12 | 10 |
4.4%
|
|
| Sysmiss | 987 |