The national average price of a gallon of unleaded gasoline has fallen to a level not seen since the spring of 2009. It fell 2.2 cents to $2.044 for the week ending Jan. 26, according to federal data.

The last time gasoline reached this level came April 4, 2009, when it averaged $2.037 per gallon, according to the U.S. Department of Energy. Gasoline is now $1.251 less than it was a year ago at this time.

Gasoline fell in seven regions and rose slightly in the Midwest and Gulf Coast where it has fallen below $2 per gallon. It rose 1.8 cents to $1.936 and 0.6 cent to $1.85 in those regions respectively.

The average price has now fallen below $2 per gallon in 28 states, according to the AAA's Daily Fuel Gauge Report. The states with the lowest price include Kansas ($1.826), Oklahoma ($1.808), and Missouri ($1.78).

Meanwhile, the average price of diesel fell 6.7 cents to $2.866. Diesel fuel costs $1.038 less than it did a year ago.