Over the last 90 years, the average retail price of gasoline has increased about 8.5 times, from 25.5 cents per gallon in 1919 to $2.16 per gallon in 2009, according to annual price data from the EIA. Over the same period, the price of a first-class stamp in the U.S. has increased 21X, from 2 cents in 1919 to 44 cents in 2009 (starting tomorrow), according to historical stamp price data available here.
But we all know that gov. monopolies are established to control prices... Stamps have gone up the last 4 years. And isn't it typical that they would raise prices during a down turn and dwindling mail usage.
If stamp prices had increased over time at "only" the rate of gas prices, a first-class stamp would only cost only 17 cents today instead of 44 cents. If stamp prices had increased at the same rate as consumer prices in general, stamps today would cost about 25 cents.