Year	current US$
1970	10264960.990669
1971	11286990.9764251
1972	14288116.1805295
1973	19670665.3929396
1974	20050371.5216197
1975	24996097.4836326
1976	25841105.0422577
1977	26994590.6593015
1978	35307445.9067988
1979	39180130.0469011
1980	46271578.858592
1981	42495827.0616802
1982	41633268.252366
1983	35702946.9714831
1984	33706230.7429565
1985	33801218.3816726
1986	43227739.1355435
1987	50609207.861391
1988	52642870.0904432
1989	48310262.9931053
1990	63385822.7006829
1991	64526341.8943329
1992	53943595.1817878
1993	73736334.9473198
1994	51570392.9348377
1995	53134289.7172465
1996	62810653.021842
1997	60732048.5271356
1998	66404650.7130862
1999	92359283.8227101
2000	94356955.7087501
2001	98959268.7142518
2002	110400864.507119
2003	149772432.502715
2004	204901674.827151
2005	237105982.190137
2006	243734743.473521
2007	262292962.447065
2008	382256503.587444
2009	417336445.716652
2010	454178681.236937
2011	509864936.249858
2012	527152076.369907
2013	583850056.312845
2014	601659845.890344
2015	331316927.859382
2016	343714264.097569
2017	368443877.971757
2018	413747689.78095
2019	417919605.886484
2020	454309168.78729
2021	516228818.011273