For the first time in history, gas prices have topped $4 in all 50 states.

Prices jumped by an average of 48 cents (regular unleaded) during the month of May, leading to a record-high national average of $4.67 per gallon, according to AAA.

Amid this unprecedented surge, all 50 states now report average fuel prices exceeding $4.00 per gallon, with Oklahoma being the last state to topple the $4 mark, on average.