Year	current US$
1970	4322531002.71642
1971	4669870960.10417
1972	6129089726.91807
1973	7691835592.22157
1974	10299819967.2668
1975	14108609453.8779
1976	14562041791.8601
1977	16448408665.4186
1978	20332848837.2093
1979	24666049953.7465
1980	28258429059.2984
1981	27256260712.1303
1982	26969801377.383
1983	25647523883.2946
1984	24783248517.6011
1985	25963193896.9193
1986	34865134008.9024
1987	41430012004.8019
1988	44099693866.3144
1989	43223510178.9019
1990	54764729550.6567
1991	57267091035.9261
1992	61905001239.1576
1993	66459925874.45
1994	72722835538.7524
1995	86748597713.2342
1996	87445033978.7153
1997	78826615043.5269
1998	77616903015.8504
1999	76908048991.8535
2000	67770522458.9498
2001	68441796649.382
2002	74487021509.0573
2003	97002475163.3837
2004	108093597483.622
2005	109940550477.318
2006	115034474651.514
2007	132415920352.897
2008	146113838699.654
2009	141465804907.02
2010	138027356647.8
2011	145595741808.546
2012	137391699950.06
2013	141337651853.696
2014	144592294968.361
2015	122983667372.482
2016	124490738066.408
2017	130677773879.56
2018	139071469163.08
2019	133751500350.201
2020	128596556180.001
2021	146120155219.451