Year	constant 2010 US$
1970	25129.4661906417
1971	25700.3229898997
1972	26427.6414796239
1973	27759.7701551334
1974	28393.4068059033
1975	27677.1003634386
1976	28885.2555053358
1977	29387.1584133371
1978	29830.7479160721
1979	30554.0742269091
1980	30534.9268775309
1981	29917.0017963817
1982	29408.3451101428
1983	30020.1886180243
1984	30908.4396005301
1985	31224.0233210908
1986	31943.6021844835
1987	32656.309968086
1988	33467.4807071948
1989	34815.6179947068
1990	35619.5214910025
1991	36321.4467396766
1992	36554.2945713794
1993	36966.6373539684
1994	38032.0266041344
1995	39266.7073489105
1996	40511.3646796989
1997	41766.4277838819
1998	42891.125385567
1999	45500.2099907264
2000	47270.5888360193
2001	46934.3657568123
2002	46833.0457374897
2003	47314.3365850765
2004	47846.279208268
2005	47762.2603001483
2006	50425.80644068
2007	51784.8145492989
2008	51230.4215060014
2009	50034.0181489772
2010	51099.5715907218
2011	52215.2230426912
2012	51645.0126436783
2013	51246.5094019709
2014	50975.4919152604
2015	51911.3877623942
2016	51946.7137968857
2017	54349.1260049469
2018	55568.0741015104