| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 3446 |
24%
|
| 2 | Once a year | 4983 |
34.7%
|
| 3 | More than once a year | 4372 |
30.4%
|
| 7 | N/A | 1227 |
8.5%
|
| 8 | Invalid | 12 |
0.1%
|
| 9 | Missing | 325 |
2.3%
|