31. Its yield per revenue passenger mile fell 2 . 7 percent to 13 . 83 cents. 32. The government assessed the " Railpax " entrance fee based upon passenger miles operated in 1970. 33. Continental is the world's ninth-largest airline in terms of passenger miles flown, a standard industry measure. 34. Indianapolis-based ATA is the nation's 10th-largest U . S . carrier based on revenue passenger miles . 35. The Dash 8 had the lowest costs per passenger mile of any feederliner of the era. 36. Traffic increased 5 . 1 percent in March to 10 . 4 billion revenue passenger miles . 37. Delta said its traffic, measured in revenue passenger miles , grew 11 percent in the fiscal quarter. 38. In the latest quarter, revenue passenger miles surged nearly 119 percent to 1 . 89 billion. 39. Yield is a measure of airline revenue that's calculated by dividing passenger revenue by passenger miles . 40. Traffic at the Phoenix-based airline increased 13 . 7 percent to 4 billion revenue passenger miles .
