| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. Per week | 4532 |
2.9%
|
| 2 | 2. Per month | 18090 |
11.5%
|
| 3 | 3. Annually | 162 |
0.1%
|
| 8 | 8. Not applicable | 134167 |
85.3%
|
| 9 | 9. Unspecified | 322 |
0.2%
|