| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 40044 |
87.4%
|
| 1 | Only once | 2218 |
4.8%
|
| 2 | A few times | 2067 |
4.5%
|
| 3 | Often | 1025 |
2.2%
|
| 8 | Refused | 84 |
0.2%
|
| 9 | Don’t know | 385 |
0.8%
|