| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 300 |
25%
|
| 1 | Just once or twice | 234 |
19.5%
|
| 2 | Several times | 235 |
19.6%
|
| 3 | Many times | 235 |
19.6%
|
| 4 | Always | 194 |
16.2%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 2 |
0.2%
|