| Value | Category | Cases | |
|---|---|---|---|
| -1 | True missing | 8 |
0.1%
|
| 0 | Never | 833 |
15.2%
|
| 1 | Rarely | 902 |
16.5%
|
| 2 | sometimes | 2455 |
44.8%
|
| 3 | often | 1270 |
23.2%
|
| 99 | Refused to answer | 11 |
0.2%
|