| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once a week | 957 |
4.5%
|
| 2 | Once a month | 1932 |
9%
|
| 3 | Once a year | 238 |
1.1%
|
| 4 | When there is a need | 2184 |
10.2%
|
| 5 | Other | 280 |
1.3%
|
| 9 | Unspecified | 15783 |
73.8%
|