| Value | Category | Cases | |
|---|---|---|---|
| -1 | True missing | 8 |
0.1%
|
| 0 | Never | 1785 |
32.6%
|
| 1 | Rarely | 605 |
11%
|
| 2 | sometimes | 1853 |
33.8%
|
| 3 | often | 1215 |
22.2%
|
| 99 | Refused to answer | 13 |
0.2%
|