U.S. gasoline prices soared nearly 9 cents over the last week to $3.68 a gallon, the highest pump price on record for April, the Energy Department said on Monday.The national price for regular unleaded gasoline is up 86 cents from a year ago, based on the department’s weekly survey of fuel prices at service stations. Cleveland and Chicago had the biggest weekly gasoline price increases, rising 19 and 18 cents a gallon, respectively.Drivers paid more for gasoline as rising crude oil costs were passed along at the pump.