| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.3%
|
| 1 | Never | 0 |
0%
|
| 2 | Rarely | 14 |
3.9%
|
| 3 | Sometimes | 7 |
1.9%
|
| 4 | Frequently | 339 |
93.9%
|