查询结果如下：   

年份	分类	数值(Number of Wells)
2000	Wells Drilled, Exploratory, Crude Oil	288.00
2001	Wells Drilled, Exploratory, Crude Oil	357.00
2002	Wells Drilled, Exploratory, Crude Oil	258.00
2003	Wells Drilled, Exploratory, Crude Oil	350.00
2004	Wells Drilled, Exploratory, Crude Oil	383.00
2005	Wells Drilled, Exploratory, Crude Oil	539.00
2006	Wells Drilled, Exploratory, Crude Oil	646.00
2007	Wells Drilled, Exploratory, Crude Oil	808.00
2008	Wells Drilled, Exploratory, Crude Oil	897.00
2009	Wells Drilled, Exploratory, Crude Oil	605.00
2010	Wells Drilled, Exploratory, Crude Oil	669.00
2011	Wells Drilled, Exploratory, Crude Oil	NA
2012	Wells Drilled, Exploratory, Crude Oil	NA
2013	Wells Drilled, Exploratory, Crude Oil	NA
2014	Wells Drilled, Exploratory, Crude Oil	NA
2015	Wells Drilled, Exploratory, Crude Oil	NA
2016	Wells Drilled, Exploratory, Crude Oil	NA

  
数据来源：http://www.eia.gov