| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 15 |
0.1%
|
| 0 | Never | 24005 |
86.6%
|
| 1 | Just once or twice | 2374 |
8.6%
|
| 2 | Several times | 722 |
2.6%
|
| 3 | Many times | 373 |
1.3%
|
| 4 | Always | 169 |
0.6%
|
| 9 | Don't Know | 55 |
0.2%
|
| 998 | Refused | 0 |
0%
|