Reasons include consumer demand for SUV and pickups. Interestingly, passenger vehicles show a drop in average miles per gallon from 25 mpg in 2005 to 24.6 mpg this year. SUVs and trucks, on the other hand, rose slightly with SUV increasing 0.2 mpg while trucks rose 0.1 mpg.
The all-time mpg high was 22.1 mpg back in 1987-1988.
[Source: Associated Press via Washington Post]