| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 |
2.7%
|
| 1 | One month or less | 27 |
10.5%
|
| 2 | 28 |
10.9%
|
|
| 3 | 67 |
26%
|
|
| 4 | 14 |
5.4%
|
|
| 5 | 3 |
1.2%
|
|
| 6 | 62 |
24%
|
|
| 7 | 5 |
1.9%
|
|
| 8 | 7 |
2.7%
|
|
| 9 | 5 |
1.9%
|
|
| 10 | 10 |
3.9%
|
|
| 11 | 4 |
1.6%
|
|
| 12 | 19 |
7.4%
|
|
| Sysmiss | 661 |