| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 2 |
0.1%
|
| 0 | Never | 2001 |
83.4%
|
| 1 | Just once or twice | 282 |
11.8%
|
| 2 | Several times | 64 |
2.7%
|
| 3 | Many times | 27 |
1.1%
|
| 4 | Always | 13 |
0.5%
|
| 9 | Don't Know | 11 |
0.5%
|
| 98 | Refused | 0 |
0%
|