Bill Clinton, Forty-Second President of the United States. Public Domain Image from NARA
1 Total vehicle miles driven by teen drivers have plummeted, not only because a smaller share of them are driving but also because miles per young driver have also declined.  In 1990, each driver aged 16 to 19 drove an average of 8,485 miles per year.
Despite more sales of pickups and SUVs, gas mileage of new vehicles climbed last month for the first time since August, the University of Michigan Transportation Research Institute reports. The average gas mileage of all cars and trucks sold in the U.S. in January was 25.4 miles per gallon. While that was up from 25.1 mpg in December, it was down from August's all-time high of 25.8 mpg. As gas prices have slid, more people have been buying larger, more fuel-thirsty vehicles.