| Value | Category | Cases | |
|---|---|---|---|
| -999999999 | 610 |
18.9%
|
|
| 1 | Training less than 1 year ago | 412 |
12.8%
|
| 2 | Training one year or more ago | 348 |
10.8%
|
| 3 | Never trained | 1852 |
57.5%
|