Passenger load factors of the US is 83.8%. That number might sound low, but US flights are the most crowded in the world.
China isn't far behind with a load factor of 80.3%, Brazil climbed from 71.8% in 2012 to 76.% in 2013, and Japan reported by far the lowest figure, just 64.3%. The global rate for the domestic market is 79.9%.
http://www.businessinsider.com/perce...crowded-2014-2