| Value | Category | Cases | |
|---|---|---|---|
| 1 | Everyday | 20 |
0.1%
|
| 2 | Once a week | 7 |
0%
|
| 3 | Once a month | 43 |
0.1%
|
| 4 | Once a term | 801 |
2.3%
|
| 5 | Once a year | 13837 |
39.3%
|
| 6 | Unspecified | 1758 |
5%
|
| 95 | Missing | 29 |
0.1%
|
| 98 | Don't know | 24 |
0.1%
|
| 99 | NA | 18670 |
53.1%
|