How much did gas cost in 1991?

January 1991 $1.25 per gallon February 1991 $1.14 per gallon March 1991 $1.08 per gallon April 1991 $1.10 per gallon May 1991 $1.16 per gallon June 1991 $1.16 per gallon July 1991 $1.13 per gallon August 1991 $1.14 per gallon September 1991 $1.14 per gallon October 1991 $1.12 per gallon November 1991 $1.13 per gallon December 1991 $1.12 per gallon