U.S. Auto Sales Rise 18 Percent

APRIL SALES: U.S. auto sales rose 18 percent as the industry's post-recession recovery continued. Small cars made big gains as gas prices topped $4 per gallon in some regions.

TOP SELLERS: Hyundai, General Motors and Chrysler notched strong sales thanks to new, more efficient vehicles. Toyota's sales were hurt by a shortage of Japan-made cars like the Prius hybrid. Toyota has 10 days' worth of Priuses left in the U.S.

WHAT'S NEXT: U.S. buyers could see more shortages of Japanese cars as summer begins, but production should be back to normal by the end of the year.