CHEYENNE  (WNE) — Average gasoline prices in Wyoming have fallen 11 cents per gallon in the last week, averaging $2.87 per gallon on Monday, according to GasBuddy.com’s survey of 494 stations in Wyoming.

Prices in Wyoming are 54.1 cents per gallon lower than a month ago, and stand 41.5 cents per gallon lower than a year ago.

The national average price of diesel has fallen 8.6 cents in the last week, and stands at $4.68 per gallon.

According to GasBuddy price reports, the lowest price in the state Sunday was $1.99 per gallon, while the highest was $3.85, a difference of $1.86 per gallon.

The national average price of gasoline has fallen 4.9 cents per gallon in the last week, averaging $3.05 on Monday. The national average is down 50.2 cents per gallon from a month ago, and stands 20.3 cents per gallon lower than a year ago, according to GasBuddy data.

The data is compiled from more than 11 million weekly price reports covering over 150,000 U.S. gas stations.