A "normal" price of oil hasn't existed since after 9/11, Just quickly looking at this chart it looks like there hasn't been a 2 year period without a major (>$20/bbl) price change since 2002...
http://www.barchart.com/chart.php?sym=CLY00&t=BAR&size=M&v=0&g=1&p=MN&d=X&qb=1&style=technical&template
http://www.barchart.com/chart.php?sym=CLY00&t=BAR&size=M&v=0&g=1&p=MN&d=X&qb=1&style=technical&template