| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing data | 0 |
0%
|
| 1 | Never | 2129 |
88.3%
|
| 2 | Just once or twice | 212 |
8.8%
|
| 3 | Several times | 38 |
1.6%
|
| 4 | Many times | 2 |
0.1%
|
| 9 | Don't know | 29 |
1.2%
|
| 998 | Refused | 0 |
0%
|