| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing data | 0 |
0%
|
| 1 | Never | 2068 |
85.8%
|
| 2 | Just once or twice | 221 |
9.2%
|
| 3 | Several times | 52 |
2.2%
|
| 4 | Many times | 17 |
0.7%
|
| 9 | Don't know | 52 |
2.2%
|
| 998 | Refused | 0 |
0%
|