| Classification | Number | Ratio(%) | |
|---|---|---|---|
| Total | 31 | 100 | |
| Organization | Forest service | 26 | 83.9 |
| Commercial | 5 | 16.1 | |
| Flight career (year) | - 10 | - | - |
| 11 - 20 | 2 | 6.5 | |
| 21 - 30 | 17 | 54.8 | |
| 31 - | 12 | 38.7 | |
| Flight time (hour) | - 2,000 | - | - |
| 2,000 – 4,000 | 13 | 41.9 | |
| 4,000 – 6,000 | 9 | 29.0 | |
| 6,000 - | 9 | 29.0 | |