查询结果如下：   

年份	分类	数值(Billion Cubic Feet)
2000	Canada	5,129.00
2001	Canada	5,070.00
2002	Canada	5,218.00
2003	Canada	5,390.00
2004	Canada	5,634.00
2005	Canada	6,046.00
2006	Canada	6,416.00
2007	Canada	6,548.00
2008	Canada	6,561.00
2009	Canada	6,483.00
2010	Canada	6,453.00
2011	Canada	6,631.00
2012	Canada	6,597.00
2013	Canada	5,349.00
2014	Canada	NA
2015	Canada	NA
2016	Canada	NA

  
数据来源：http://www.eia.gov