| Value | Category | Cases | |
|---|---|---|---|
| -1 | True missing | 9 |
0.2%
|
| 0 | Never | 498 |
9.1%
|
| 1 | Rarely | 658 |
12%
|
| 2 | sometimes | 1614 |
29.5%
|
| 3 | often | 2683 |
49%
|
| 99 | Refused to answer | 17 |
0.3%
|