How much did ground beef cost in 2015?

January 2015 $4.24 per pound February 2015 $4.24 per pound March 2015 $4.20 per pound April 2015 $4.23 per pound May 2015 $4.14 per pound June 2015 $4.22 per pound July 2015 $4.20 per pound August 2015 $4.16 per pound September 2015 $4.13 per pound October 2015 $4.08 per pound November 2015 $4.11 per pound December 2015 $4.06 per pound