Year	constant 2010 US$
1970	9931.35962658874
1971	10205.0730530824
1972	10817.4852803361
1973	11394.5092082298
1974	11202.4692295054
1975	11188.3605897731
1976	11246.2321583604
1977	11205.2047840788
1978	11804.3090495954
1979	12308.6639534524
1980	12283.5725452833
1981	12299.2772414427
1982	12438.0457803013
1983	12955.5784188131
1984	13234.5459745223
1985	13717.5859343249
1986	14570.4482001719
1987	15339.7039701318
1988	16492.9473322029
1989	17024.2071974043
1990	17138.8786757023
1991	16733.442480306
1992	16951.3199551217
1993	17643.9452814846
1994	18218.4323074508
1995	18563.4852832521
1996	19211.4645276641
1997	20074.65120106
1998	20793.2351324891
1999	21705.7369926192
2000	22619.0574126775
2001	23355.6593317289
2002	24151.0712643528
2003	24881.0065493916
2004	25535.2830004149
2005	26140.4439723099
2006	26367.9221099641
2007	26821.965604166
2008	26458.7118688258
2009	25485.6668865798
2010	25468.4665539308
2011	25105.9054684667
2012	25314.6417445556
2013	25610.1889936138
2014	25934.5853502718
2015	26388.1279185208
2016	27019.3271719072
2017	27387.0017391126
2018	27659.3348563155