| Ranks | |||
|
| D6―How long have you been working as an air traffic controller? | N | Mean Rank |
| Occupational Application and Processes | 0 - 2 years | 46 | 166.16 |
| 3 - 5 years | 52 | 141.78 | |
| 6 - 9 years | 54 | 129.43 | |
| 10 years and more | 138 | 146.30 | |
| Total | 290 |
| |
| Foreign Customers | 0 - 2 years | 46 | 165.75 |
| 3 - 5 years | 52 | 137.36 | |
| 6 - 9 years | 54 | 135.46 | |
| 10 years and more | 138 | 145.75 | |
| Total | 290 |
| |
| Service Quality | 0 - 2 years | 46 | 136.82 |
| 3 - 5 years | 52 | 124.72 | |
| 6 - 9 years | 54 | 148.94 | |