| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 550 |
45.8%
|
| 1 | Just once or twice | 161 |
13.4%
|
| 2 | Several times | 247 |
20.6%
|
| 3 | Many times | 116 |
9.7%
|
| 4 | Always | 105 |
8.8%
|
| 8 | Refused | 1 |
0.1%
|
| 9 | Don't know | 20 |
1.7%
|