Missouri became the first state since 2009 to see the average statewide gas price fall below $2 a gallon, according to AAA.

The national average gas price was at $2.27 a gallon this morning, the lowest since May 2009. That average has dropped for 92 days in a row, which is the longest streak since AAA started keeping daily records in January 2000.

In Indiana, the average price this morning was $2.02. In Kentucky, the average price was $2.095.

Local prices this morning were:

Madison: $1.96 to $2.01

Hanover: $1.98

Milton: $2.01

Carrollton: $1.91 to $2.17

Vevay: $2.09

Gas prices have fallen every day since Sept. 25, for a total of $1.02 per gallon, an AAA spokesman said.

Missouri's average on Friday morning was $1.98, according to AAA.

Kansas had the third-lowest statewide average at $2.06 per gallon, while Texas and Indiana each averaged $2.09, AAA reported.

Gas prices are about 94 cents a gallon lower than they were a year ago, and AAA estimates consumers nationwide are saving more than $450 million per day on gasoline compared with the highs of spring and summer this year.

The slide is expected to continue in the short term.

"Consumers could ring in the New Year with gas prices about 5 to 10 cents per gallon less than today, which would make for the lowest New Year's gas prices since 2008," according to AAA.

A government report last week said the economy has been benefiting from sinking energy prices, and that cheaper gas has freed up money for Americans to spend on other items, such as cars, clothes and appliances.

It's uncertain how long those prices will continue their descent before rising again due to typical season trends. Refinery maintenance and decreased refinery production could push prices upward within a month.