| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. never | 1470 |
96.8%
|
| 1 | 1. yes, more than a year ago | 26 |
1.7%
|
| 2 | 2. yes, in the last year | 23 |
1.5%
|
| Sysmiss | 44 |