Crude Oil prices ranged between $2.50 and $3.00 from 1948 through the end of the 1960s. The price oil rose from $2.50 in 1948 to about $3.00 in 1957. When viewed in 2006 dollars an entirely different story emerges with crude oil prices fluctuating between $17 - $18 during the same period. The apparent 20% price increase just kept up with inflation.

译文:
从1948年直到60年代末，原油价格介于2.50—3.00美元之间。石油价格从1948年的2.50美元上涨到1957年约3.00美元。2006年，当美元被视为具有非同寻常的意义之时，伴随其出现的是与同一期相比较，原油价格起伏不定，在17—18美元之间。很明显，百分之二十的价格增幅是缘于不断地通货膨胀。