UNDATED -- Average gas prices have fallen below $4 in Minnesota.

Gas Buddy says gas prices have gone down another 16.9 cents per gallon in the past week in the state now averaging $3.97.

The national average for gas has fallen 15.8 cents per gallon in the last week averaging $4.01.

The national average price for diesel has also declined 13.1 cents and is now at $5.14.

Gas Buddy expects the national average for gas to fall back under $4 as soon as Monday.  Diesel should soon fall under $5.

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They say nearly a dozen stations in low-priced states like Texas, Oklahoma, Kansas and Iowa are already at $2.99 for gas.

LOOK: See how much gasoline cost the year you started driving

To find out more about how has the price of gas changed throughout the years, Stacker ran the numbers on the cost of a gallon of gasoline for each of the last 84 years. Using data from the Bureau of Labor Statistics (released in April 2020), we analyzed the average price for a gallon of unleaded regular gasoline from 1976 to 2020 along with the Consumer Price Index (CPI) for unleaded regular gasoline from 1937 to 1976, including the absolute and inflation-adjusted prices for each year.

Read on to explore the cost of gas over time and rediscover just how much a gallon was when you first started driving.

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