11. Total passenger kilometers used increased by 6.31 % to 12.02 million in November 1997 from 11.31 million in 1996. 12. Atlanta-based Delta is the third-biggest U . S . carrier after United and American, measured by revenue passenger kilometers . 13. Yield per revenue passenger kilometers in the year rose to 10 . 9 percent from 10 . 6 percent. 14. Central to the program is to lower the costs per passenger kilometer to 15 pfennig from the current 17 pfennig. 15. It's the second-biggest after UAL Corp .'s United by 1995 revenue passenger kilometers , the total distance flown by all paying passengers. 16. Over the next 20 years, Airbus predicted, there will be an average growth of 5.3 percent a year in passenger kilometers . 17. Additionally, PIA's revenue from excess baggage, passenger load factor and passenger kilometer flow are among many that have been declining steadily. 18. Likewise, on a monthly basis, passenger kilometers used grew by 0 . 94 % from 12 . 58 million last September. 19. When risk is measured by deaths per passenger kilometer , air travel is approximately 10 times safer than travel by bus or rail. 20. Over the next 20 years, Airbus predicted, there will be an average growth of 5 . 3 percent a year in passenger kilometers .
