| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 548 |
45.7%
|
| 1 | Just once or twice | 275 |
22.9%
|
| 2 | Several times | 240 |
20%
|
| 3 | Many times | 112 |
9.3%
|
| 4 | Always | 21 |
1.8%
|
| 8 | Refused | 1 |
0.1%
|
| 9 | Don't know | 3 |
0.3%
|