| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 3 |
0.3%
|
| 0 | Never | 900 |
75%
|
| 1 | Once or twice | 172 |
14.3%
|
| 2 | Several times | 93 |
7.8%
|
| 3 | Many times | 31 |
2.6%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't Know | 1 |
0.1%
|