查询结果如下：   

年份	分类	数值(Dollars per Barre)
2000	Crude Oil Domestic First Purchase Price	26.72
2001	Crude Oil Domestic First Purchase Price	21.84
2002	Crude Oil Domestic First Purchase Price	22.51
2003	Crude Oil Domestic First Purchase Price	27.56
2004	Crude Oil Domestic First Purchase Price	36.77
2005	Crude Oil Domestic First Purchase Price	50.28
2006	Crude Oil Domestic First Purchase Price	59.69
2007	Crude Oil Domestic First Purchase Price	66.52
2008	Crude Oil Domestic First Purchase Price	94.04
2009	Crude Oil Domestic First Purchase Price	56.35
2010	Crude Oil Domestic First Purchase Price	74.71
2011	Crude Oil Domestic First Purchase Price	95.73
2012	Crude Oil Domestic First Purchase Price	94.52
2013	Crude Oil Domestic First Purchase Price	95.99
2014	Crude Oil Domestic First Purchase Price	87.39

  
数据来源：http://www.eia.gov