Year	current US$
1966	7200000
1967	6100000
1968	7300000
1969	9400000
1970	11300000
1971	14500000
1972	21628586.9447137
1973	33631726.890683
1974	63721749.3585898
1975	96677094.9114713
1976	129298433.872964
1977	161725479.832886
1978	210690182.155854
1979	287997386.27351
1980	343448513.466418
1981	365804165.141619
1982	386560611.739448
1983	384078815.793788
1984	379973552.70568
1985	446138468.297958
1986	571854851.715627
1987	618382201.166451
1988	474515028.131696
1989	533399210.765054
1990	631076188.376077
1991	667660245.682024
1992	683288009.222205
1993	696503306.0732
1994	657754037.196565
1995	743847540.736547
1996	686217247.886016
1997	820624166.296388
1998	1043347808.80855
1999	1304192108.01441
2000	1157987561.55416
2001	1312686902.40082
2002	1566796851.57437
2003	2944154771.48057
2004	3395938240.55407
2005	4542367332.09191
2006	5382660565.02756
2007	9416379446.11503
2008	9649461018.98446
2009	18369737547.5506
2010	30620763212.5165
2011	16198468642.533
2012	32520970130.0802
2013	41601456587.965
2014	42734145117.5334
2015	36500329765.0352
2016	30793635697.8996
2017	13769776423.6432
2018	29070399756.0135
2019	37651273314.4075
2020	37524561601.8967
2021	38892974934.579
2022	42041594224.6236
2023	44844912182.0722