| Value | Category | Cases | |
|---|---|---|---|
| 1 | (a) More than twice a day | 8 |
4.9%
|
| 2 | (b) Twice a day | 24 |
14.6%
|
| 3 | (c) Once a day | 14 |
8.5%
|
| 4 | (d) Once or twice a week | 45 |
27.4%
|
| 5 | (e) Once a month | 40 |
24.4%
|
| 6 | (f) Once in 3 months | 10 |
6.1%
|
| 96 | other | 23 |
14%
|
| Sysmiss | 336 |