Year	current US$
1960	3100000
1961	6600000
1962	8510000
1963	26600000
1964	35600000
1965	38400000
1966	38900000
1967	37000000
1968	44200000
1969	46500000
1970	45410000
1971	46166863.9078952
1972	63860583.0346459
1973	41259985.5293564
1974	77558685.5433159
1975	106977275.180372
1976	185382180.995553
1977	211245498.294113
1978	268139795.228302
1979	142586107.45292
1980	77700000
1981	71939674.5584418
1982	108542189.449706
1983	160204695.59766
1984	165819604.191395
1985	179643936.731107
1986	169700000
1987	186142559.832031
1988	161613456.95792
1989	265913141.640602
1990	414814226.572392
1991	287200000
1992	422113750.051563
1993	536219229.81857
1994	649401406.855152
1995	758339824.713703
1996	936928307.871941
1997	1307910997.20435
1998	1613079244.31334
1999	1819802189.99411
2000	1772563135.18711
2001	1593711384.95644
2002	1472816682.7743
2003	1790678166.18496
2004	1752409349.50117
2005	1721406455.47838
2006	1822789886.97128
2007	2108523963.9261
2008	2441647733.68893
2009	2867385586.06699
2010	2568208188.84522
2011	2151456411.76904
2012	2804923319.68549
2013	2476175225.7377
2014	2430270623.48455
2015	2739835136.10091
2016	3187788699.81609
2017	3510079660.79971
2018	3512277016.47393
2019	4378651102.52269
2020	2999443127.1397
2021	3345767659.22409