| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 2127 |
88.6%
|
| 1 | Only once | 98 |
4.1%
|
| 2 | A few times | 131 |
5.5%
|
| 3 | Often | 43 |
1.8%
|
| 9 | Don't know | 1 |
0%
|
| 998 | Refused | 0 |
0%
|