The Research and Innovative Technology Administration of the Bureau of Transportation Statistics reports load factors (passenger-miles as a percentage of available seat-miles) for commercial airlines for every month from 2000 through September 2013. Here are histograms comparing the domestic and international load factors for this time period:

Compare and contrast the distributions.

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60 50 40 30 50 30 20 10 10 55 60 85 70 75 80 85 90 Domestic Load Factor (%) 55 80 65 70 75 80 85 90 International Load Factor (%) Domestic International Mean Median Std Dev QR n Missing 77.36715 78,02 6.45481 9.20 165 0 77.75976 77.98 5.22681 6.78 165 0