Year	current US$
1960	18996554.502938457
1961	21990595.5188749
1962	21014593.9871783
1963	23014448.125545714
1964	26015356.728745654
1965	25246803.31137561
1966	38917610.4209748
1967	47836696.4600761
1968	52485166.16024416
1969	49982479.65093353
1970	48785539.651816614
1971	52526916.41075263
1972	62252052.232353084
1973	78091905.42907594
1974	79439605.63324015
1975	105237436.94383305
1976	96437470.85117975
1977	101778639.11068887
1978	115579325.9700856
1983	91812849.20391068
1984	118341977.6459023
1985	104925295.38874985
1986	123392206.15770963
1987	127451605.37239392
1988	152054719.85716325
1989	182804040.46792525
1990	238555426.7854865
1991	193733197.4382804
1992	193404821.40585837
1993	157729545.18824327
1994	106987567.69881499
1995	158870580.11077452
1996	162815764.55418265
1997	178313001.49153623
1998	188058185.2643803
1999	150102646.24392012
2000	119246195.96324247
2001	157593553.20634523
2002	180972429.83663046
2003	210411288.323256
2004	222058704.0837593
2005	15466800.665995315
2006	51691568.536669694
2007	58427064.05402053
2008	79791456.342041
2009	92571540.81017204
2010	103773765.46860602
2011	210142318.5900175
2012	254624201.7271755
2013	352367609.8202496
2014	374726588.86907053
2015	304233662.16951954
2016	298400079.11501145
2017	292582493.8743931
2018	323002869.8823749
2019	322929857.609623
2020	341981907.63863343