查询结果如下：   

年份	分类	数值（十亿美元）
2005	Current surplus of government enterprises	-4.50
2006	Current surplus of government enterprises	-7.00
2007	Current surplus of government enterprises	-14.20
2008	Current surplus of government enterprises	-18.20
2009	Current surplus of government enterprises	-16.10
2010	Current surplus of government enterprises	-20.10
2011	Current surplus of government enterprises	-19.40
2012	Current surplus of government enterprises	-15.40
2013	Current surplus of government enterprises	-15.90
2014	Current surplus of government enterprises	-11.00
2015	Current surplus of government enterprises	-5.80
2016	Current surplus of government enterprises	-2.30
2017	Current surplus of government enterprises	-4.90

数据来源：美国经济分析局（Bureau of Economic Analysis）