查询结果如下：   

年份	分类	数值（相对值）
2000	Gross domestic purchases	81.64
2001	Gross domestic purchases	83.21
2002	Gross domestic purchases	84.36
2003	Gross domestic purchases	86.20
2004	Gross domestic purchases	88.73
2005	Gross domestic purchases	91.85
2006	Gross domestic purchases	94.78
2007	Gross domestic purchases	97.37
2008	Gross domestic purchases	100.24
2009	Gross domestic purchases	100.00
2010	Gross domestic purchases	101.53
2011	Gross domestic purchases	103.97
2012	Gross domestic purchases	105.81
2013	Gross domestic purchases	107.29
2014	Gross domestic purchases	109.10
2015	Gross domestic purchases	109.56
2016	Gross domestic purchases	110.66
2017	Gross domestic purchases	112.69

 

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