| 1. | Yields are a measure of average revenues collected per seat, per passenger kilometer.
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| 2. | From 1992 to 2005, passenger kilometers increased 5.2 % per year.
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| 3. | In 2007, 101 million passengers were transported 490 million passenger kilometers by rail transit.
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| 4. | Domestic revenue passenger kilometers rose 11 . 8 percent.
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| 5. | Yield per revenue passenger kilometers in the year rose to 10.9 percent from 10.6 percent.
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| 6. | Likewise, on a monthly basis, passenger kilometers used grew by 0.94 % from 12.58 million last September.
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| 7. | Passenger traffic measures revenue passenger kilometers, or the total number of kilometers flown by all paying passengers.
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| 8. | Here, the units are in per 100 p-km ( read as person kilometer or passenger kilometer ).
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| 9. | Domestic revenue passenger kilometers rose 11.8 percent.
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| 10. | Delta is the third-biggest U . S . carrier after United and American, measured by revenue passenger kilometers.
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