According to wikipedia there were 32,675 fatalities in 2014. https://en.wikipedia.org/wiki/List_of_motor_vehicle_deaths_i..., around 10 fatalities per 100,000 population.

The CDC data with comparison to other ways people die in the US is at http://www.cdc.gov/nchs/fastats/leading-causes-of-death.htm

Table 28 of http://www.cdc.gov/nchs/data/hus/hus15.pdf#019 is relevant to this discussion