| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 4 |
0.3%
|
| 0 | Never | 1100 |
91.7%
|
| 1 | Just once or twice | 65 |
5.4%
|
| 2 | Several times | 19 |
1.6%
|
| 3 | Many times | 9 |
0.8%
|
| 4 | Always | 2 |
0.2%
|
| 9 | Don't Know | 1 |
0.1%
|
| 998 | Refused | 0 |
0%
|