| Value | Category | Cases | |
|---|---|---|---|
| -999999999 | 610 |
18.9%
|
|
| 1 | Training less than 1 year ago | 385 |
11.9%
|
| 2 | Training one year or more ago | 524 |
16.3%
|
| 3 | Never trained | 1703 |
52.9%
|