Year	current US$
1970	68141480.1266702
1971	86605494.6397536
1972	130633507.646781
1973	156332857.18644
1974	160566502.330033
1975	225176477.766854
1976	261223519.395858
1977	285330789.958633
1978	402361130.348021
1979	581736846.322611
1980	580830897.815028
1981	553720416.171846
1982	512942098.68557
1983	473558883.957897
1984	406374378.334513
1985	396625593.9078
1986	592514524.692671
1987	643481816.892151
1988	650890513.305164
1989	585820750.87392
1990	644361995.042644
1991	638229688.488644
1992	755158669.178645
1993	706570966.393161
1994	376971425.124824
1995	430544599.670359
1996	448931333.947412
1997	429109154.942848
1998	404442200.683668
1999	452089584.019208
2000	383726823.691088
2001	392849021.781472
2002	478824168.241834
2003	577982686.078107
2004	638911372.532682
2005	667439218.770834
2006	691101443.111745
2007	819614930.214901
2008	994072457.467569
2009	983127968.233861
2010	1055033450.91357
2011	981199045.704794
2012	1085248577.78665
2013	1322136130.17738
2014	2185774665.0972
2015	1506534315.25966
2016	1779925980.08562
2017	1835286675.68386
2018	1778329629.53151
2019	1815497897.65783
2020	1896005678.32343
2021	2164584452.49311