| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 2760 |
99.1%
|
| 2 | During last 3 months | 4 |
0.1%
|
| 3 | During last 6 months | 2 |
0.1%
|
| 4 | During last year | 8 |
0.3%
|
| 5 | More than one year ago | 10 |
0.4%
|
| Sysmiss | 15 |