Year	constant 2021 US$
1970	5266690068.960191
1971	5429919967.949392
1972	6208219964.146616
1973	7808389914.073058
1974	11922489978.350704
1975	12590870072.185993
1976	11888270020.246511
1977	13367289940.834059
1978	13188750041.998924
1979	16397800274.372105
1980	16661480181.813248
1981	17399029879.212383
1982	16152309863.388556
1983	15038460075.378428
1984	14947680061.459547
1985	17165269931.793217
1986	15121840178.608902
1987	15161740083.694471
1988	13872359858.779234
1989	13621809946.060177
1990	15640930074.840796
1991	14631329968.89949
1992	13644500208.213934
1993	13519849937.140947
1994	15481279905.885462
1995	11805060060.519728
1996	10987090056.531134
1997	10848769980.371004
1998	10949769945.859913
1999	10084900031.566626
2000	10420050096.511852
2001	13484699998.855597
2002	17957880075.454712
2003	25820160150.52796
2004	24796390067.100544
2005	55090439594.26882
2006	46765929929.73328
2007	37860419719.69606
2008	39270570262.908936
2009	37161510057.449356
2010	39311749898.910545
2011	38587360198.97461
2012	36515000318.52724
2013	42446759984.97012
2014	39825209897.99502
2015	42647369998.931915
2016	48811550237.65565
2017	54197549757.00381
2018	58828910173.41617
2019	57007889656.06694
2020	64136479751.58696
2021	57701180786.132835