Year	current US$
1970	6230000.011622906
1971	7450000.016018748
1972	14909999.69281256
1973	13170000.031590462
1974	23499999.843537807
1975	30760000.184178345
1976	28780000.153929006
1977	40099999.75003302
1978	59069999.85873699
1979	105419999.3740768
1980	136300000.31366944
1981	106209999.4197488
1982	81399999.73028903
1983	101700000.21904705
1984	100210000.83163382
1985	125970000.11429192
1986	135359998.74770638
1987	154499999.70570207
1988	169100000.86575744
1989	202180000.34242857
1990	230399999.38942495
1991	246129998.65412715
1992	328990000.00953686
1993	325249996.90055835
1994	357429998.15940845
1995	344810000.240803
1996	310950001.2993813
1997	161470000.68426126
1998	147019999.80211258
1999	159729999.48263162
2000	169320000.08225435
2001	182379998.08788303
2002	166919999.7186661
2003	192699999.33242795
2004	200900000.09536746
2005	253910000.86069107
2006	292590002.05993664
2007	441640001.83343863
2008	471089996.933937
2009	463559999.34673303
2010	492559999.82357025
2011	472660003.066063
2012	396737876.65367126
2013	457325374.4244576
2014	518706293.64252084
2015	530600070.14870656
2016	518837900.72146815
2017	543661111.2356191
2018	533543705.4634098
2019	568856996.2978363
2020	548517003.5362244
2021	491795000.4935266
2022	486466001.1529926