Year	current US$
1970	6120000.122115016
1971	9730000.013485547
1972	19399999.903514978
1973	13380000.129342094
1974	17359999.686479565
1975	12950000.049546372
1976	9880000.043660402
1977	13800000.155344602
1978	28390000.106766805
1979	28230000.29101968
1980	50619999.915361464
1981	57920000.34451485
1982	38659999.627619974
1983	47549999.736249454
1984	67400000.09350479
1985	62209999.259561345
1986	81940001.34244566
1987	105359998.78495933
1988	146809999.42123896
1989	171040000.93042853
1990	230000000
1991	231649999.9016524
1992	284840002.14934355
1993	303350001.8417834
1994	374129996.80638313
1995	560759998.8281727
1996	542229999.5720387
1997	441570006.8995359
1998	496089999.85456467
1999	415940002.5457144
2000	297990002.15530396
2001	502139996.02198666
2002	296529999.3157388
2003	414520000.09082264
2004	476510003.63938516
2005	548800001.040101
2006	696040000.8559227
2007	850439999.3419648
2008	880870003.4618375
2009	946520005.3453443
2010	1057059994.9955945
2011	1080799999.8331072
2012	986770008.5118414
2013	727089997.2617629
2014	481679999.92519635
2015	948699994.1244729
2016	936609992.8617483
2017	672519997.596741
2018	1095859985.649586
2019	571500002.026558
2020	1093909996.0923188
2021	749620009.8488485
2022	531580005.0944089