How much did ground beef cost in 1991?

January 1991 $1.65 per pound February 1991 $1.63 per pound March 1991 $1.61 per pound April 1991 $1.61 per pound May 1991 $1.62 per pound June 1991 $1.60 per pound July 1991 $1.59 per pound August 1991 $1.58 per pound September 1991 $1.55 per pound October 1991 $1.55 per pound November 1991 $1.57 per pound December 1991 $1.58 per pound