| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 2714 |
97.9%
|
| 2 | During last 3 months | 15 |
0.5%
|
| 3 | During last 6 months | 7 |
0.3%
|
| 4 | During last year | 17 |
0.6%
|
| 5 | More than one year ago | 18 |
0.6%
|
| Sysmiss | 13 |