| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once a week | 562 |
2.7%
|
| 2 | Once a month | 1364 |
6.4%
|
| 3 | Once a year | 101 |
0.5%
|
| 4 | When there is a need | 2396 |
11.3%
|
| 5 | Other | 65 |
0.3%
|
| 9 | Unspecified | 16702 |
78.8%
|