| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 758 |
73.2%
|
| 1 | Once a year | 138 |
13.3%
|
| 2 | Once in 6 months | 36 |
3.5%
|
| 3 | Once in 2 or 3 months | 43 |
4.2%
|
| 4 | Once a month | 35 |
3.4%
|
| 5 | Several times a month | 26 |
2.5%
|