| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 502 |
48.5%
|
| 1 | Once a year | 77 |
7.4%
|
| 2 | Once in 6 months | 71 |
6.9%
|
| 3 | Once in 2 or 3 months | 90 |
8.7%
|
| 4 | Once a month | 206 |
19.9%
|
| 5 | Several times a month | 90 |
8.7%
|