| Value | Category | Cases | |
|---|---|---|---|
| -1 | True missing | 15 |
0.3%
|
| 1 | All the time | 2958 |
54%
|
| 2 | Most of the time | 1222 |
22.3%
|
| 3 | Sometimes | 1085 |
19.8%
|
| 4 | Never | 196 |
3.6%
|
| 99 | Refused to answer | 3 |
0.1%
|