Year	current US$
1970	6367806.39730985
1971	5394204.96271679
1972	6007813.74398529
1973	10102820.90832
1974	10915080.0873238
1975	15922485.3054217
1976	13857402.9699067
1977	26398337.6304602
1978	26333649.8466677
1979	23793150.50251
1980	30106216.3696284
1981	27423172.6798783
1982	39511384.2634792
1983	25574384.4856265
1984	23503402.1419117
1985	16473078.2178944
1986	27535528.136312
1987	26437888.4205779
1988	29085521.1450327
1989	29017113.1494937
1990	23254111.6810435
1991	24662609.2300239
1992	25590055.1675099
1993	20447377.3364578
1994	25669565.2173913
1995	40751637.3097235
1996	41900676.0416667
1997	40227282.3342139
1998	42964695.5790377
1999	30783507.3918194
2000	30688963.414808
2001	29832356.5251165
2002	36071707.0278155
2003	63312315.7219277
2004	58258864.3031332
2005	58220410.1694794
2006	55235142.9852777
2007	84985043.9069831
2008	96451728.2234964
2009	102761709.667456
2010	87923287.8362143
2011	100326962.68114
2012	116597593.738822
2013	120760206.546937
2014	136467621.764426
2015	146573103.777905
2016	153721582.595043
2017	145272578.083993
2018	92170499.4883696
2019	91637897.8295654
2020	101642641.103759
2021	107780147.692174