| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once a week or more often | 7 |
0.7%
|
| 2 | About once a fortnight | 0 |
0%
|
| 3 | About once a month | 1 |
0.1%
|
| 4 | Less often than once a month | 2 |
0.2%
|
| 8 | Not applicable | 987 |
98.9%
|
| 9 | Unspecified | 1 |
0.1%
|