| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Never | 108 |
18%
|
| 2 | Rarely | 138 |
23%
|
| 3 | Sometimes | 222 |
36.9%
|
| 4 | Frequently | 133 |
22.1%
|