| Value | Category | Cases | |
|---|---|---|---|
| 1 | never | 1964 |
79.5%
|
| 2 | during last 3 months | 145 |
5.9%
|
| 3 | during last 6 months | 58 |
2.3%
|
| 4 | during last year | 76 |
3.1%
|
| 5 | more than one year ago | 228 |
9.2%
|
| Sysmiss | 12 |