I drive a Scion xA in America, it's only 100mpg. I think small cars like this (Honda Fit, etc) are catching on, at least in cities. But even still I only get 32

I drive a Scion xA in America, it's only 100mpg. I think small cars like this (Honda Fit, etc) are catching on, at least in cities. But even still I only get 32-38mpg; maybe from worse aerodynamics?