The U.S. national average price of gasoline has fallen below $3 per gallon for the first time in more than three and a half years. According to GasBuddy data compiled from more than 12 million individual price reports covering over 150,000 gas stations across the country, the average national gasoline price was $2.97 per gallon on Monday, a level they last touched in 2021. De Haan has noted that some 35 U.S. states now enjoy average gas prices below $3 per gallon, an increase of seven states from a month ago. “The national average has finally…