How much did lean ground beef cost in 1991?

January 1991 $2.18 per pound February 1991 $2.18 per pound March 1991 $2.15 per pound April 1991 $2.18 per pound May 1991 $2.19 per pound June 1991 $2.14 per pound July 1991 $2.15 per pound August 1991 $2.17 per pound September 1991 $2.13 per pound October 1991 $2.14 per pound November 1991 $2.18 per pound December 1991 $2.14 per pound