| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | One month or less | 35 |
25%
|
| 2 | 17 |
12.1%
|
|
| 3 | 29 |
20.7%
|
|
| 4 | 17 |
12.1%
|
|
| 5 | 7 |
5%
|
|
| 6 | 11 |
7.9%
|
|
| 7 | 5 |
3.6%
|
|
| 8 | 7 |
5%
|
|
| 9 | 1 |
0.7%
|
|
| 10 | 1 |
0.7%
|
|
| 12 | 10 |
7.1%
|
|
| Sysmiss | 220 |