| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 4 |
0.2%
|
| 0 | Never | 1647 |
68.4%
|
| 1 | Just once or twice | 201 |
8.4%
|
| 2 | Several times | 273 |
11.3%
|
| 3 | Many times | 177 |
7.4%
|
| 4 | Always | 17 |
0.7%
|
| 9 | Don't Know | 88 |
3.7%
|
| 998 | Refused | 0 |
0%
|