| Value | Category | Cases | |
|---|---|---|---|
| 1 | Everyday | 10 |
0.1%
|
| 2 | Once a week | 2 |
0%
|
| 3 | Once a month | 15 |
0.1%
|
| 4 | Once a term | 237 |
1.7%
|
| 5 | Once a year | 7788 |
55.6%
|
| 6 | Unspecified | 749 |
5.3%
|
| 95 | Missing | 82 |
0.6%
|
| 98 | Don't know | 1 |
0%
|
| 99 | NA | 5127 |
36.6%
|