| Value | Category | Cases | |
|---|---|---|---|
| -1 | True missing | 8 |
0.1%
|
| 0 | Never | 573 |
10.5%
|
| 1 | Rarely | 796 |
14.5%
|
| 2 | sometimes | 2583 |
47.1%
|
| 3 | often | 1505 |
27.5%
|
| 99 | Refused to answer | 14 |
0.3%
|