| Value | Category | Cases | |
|---|---|---|---|
| -1 | missing | 0 |
0%
|
| 0 | never | 1064 |
78.8%
|
| 1 | sometimes | 144 |
10.7%
|
| 2 | often | 30 |
2.2%
|
| 3 | always | 20 |
1.5%
|
| 9 | don't know | 92 |
6.8%
|