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WASHINGTON, D.C. — The national average price of gas in 2015 was $2.40 per gallon of regular gasoline, the second-cheapest annual average for the past 10 years, according to the AAA Year-End Gas Price Report. The year's annual average was also approximately 94 cents per gallon less than 2014.
Over the course of the year, AAA estimates that Americans saved more than $115 billion on gasoline compared to 2014, which was an average of more than $550 per licensed driver. In recent years, the annual average price of gas was $3.34 (2014), $3.49 (2013), $3.60 (2012), $3.51 (2011), $2.78 (2010) and $2.35 (2009).
The most expensive day of the year was June 15, when the daily national average was $2.804 per gallon, and the least expensive was Dec. 21, when it was $1.998 per gallon. Average gas prices dropped below $2 per gallon on Dec. 21 for the first time since March 25, 2009.
The average price of diesel in 2015 was $2.71 per gallon, which was the lowest average for the fuel since 2009. In 2014, diesel averaged $3.81 per gallon.
The average price of premium gasoline was $2.84 per gallon, 87 cents per gallon less than 2014. The average difference between regular and premium was 44 cents per gallon in 2015, marking the largest difference on record.
Overall, fuel prices remained relatively low throughout 2015 due to a worldwide glut in crude oil, which was more than enough to meet demand and allowed oil prices to drop to their lowest levels since 2009.
The current national average price of gas was $2 per gallon as of Dec. 31, which was the lowest average for New Year's Eve since 2008. This was also approximately 26 cents less than one year ago. For the month of December, the national average was $2.01 per gallon, which was the lowest monthly average since March 2009.
In most parts of the country, gas prices are currently lower than $2 per gallon, and about 71 percent of U.S. gas stations are selling gas for less than $2 per gallon. Drivers can find at least one gas station selling gas for less than $2 in 47 states.
The cheapest 1 percent of gas stations are selling gas for an average of $1.56 per gallon, and more than 16,000 gas stations across the United States are selling gas for less than $1.75 per gallon.
The five states with the lowest average prices include Missouri ($1.72), Oklahoma ($1.75), South Carolina ($1.75), Arkansas ($1.75) and Tennessee ($1.76), while the five states with the highest prices include California ($2.85), Hawaii ($2.69), Nevada ($2.51), Washington ($2.47) and Alaska ($2.47).