Gas prices
Gas prices
Three-and-a-half years ago, filling up at the pump cost around $1.60 a gallon. But then, gas prices began to climb, eventually topping out at nearly $4 a gallon in mid-2011, and coming pretty close again in 2012. Since then, prices have fallen back a bit.


@CNNMoney - Last updated January 18 2013: 5:12 PM ET