Gas prices continue to drop to multi-year lows, with Monday’s average price of $1.97 per gallon representing the cheapest average price at the pump since March 23, 2009.

According to AAA, gas prices have fallen for 55 of the past 66 days for a total savings of 26 cents per gallon and should remain relatively low because there is more than enough oil and gasoline around the world to meet demand. AAA said drivers are saving three cents per gallon on the week, five cents per gallon on the month and 17 cents per gallon versus this same date last year.

Missouri’s ($1.65) and Oklahoma’s ($1.70) are the nation’s least expensive markets for retail gasoline.

Kansas City was $1.67, 4 cents cheaper than a week ago. St. Joseph came in with an average of $1.67 a gallon, 5 cents lower than last week. That’s also $2.27 lower than St. Joseph’s highest recorded average price for regular unleaded which came in at $3.96 a gallon on May 21, of 2013.