最近一次在是2008年大崩盘之前的一年中，油价几乎上涨两倍；接着，油价在六个月的时间内暴跌至40美元，紧随而至的便是2009年4月开始的经济复苏。
Most recently, the price of oil almost tripled, from $50 to $140, in the year leading up to the 2008 crash; it then plunged to $40 in the six months immediately before the economic recovery that started in April 2009.