| Value | Category | Cases | |
|---|---|---|---|
| 1 | Everyday | 17 |
0.1%
|
| 2 | Once a week | 31 |
0.2%
|
| 3 | Once a month | 477 |
3.4%
|
| 4 | Once a term | 2995 |
21.4%
|
| 5 | Once a year | 4825 |
34.4%
|
| 6 | Unspecified | 765 |
5.5%
|
| 95 | Missing | 63 |
0.4%
|
| 98 | Don't know | 6 |
0%
|
| 99 | NA | 4832 |
34.5%
|