Year	constant 2021 US$
1960	19270000.4577637
1961	28610000.6103516
1962	50950000.762939505
1963	39520000.4577637
1964	11109999.6566772
1965	17520000.4577637
1966	20469999.3133545
1967	47419998.1689453
1968	48369998.9318848
1969	57150001.5258789
1970	51799999.237060495
1971	39439998.626709
1972	27379999.1607666
1973	30180000.3051758
1974	35290000.9155273
1975	40569999.6948242
1976	55630001.0681152
1977	39840000.1525879
1978	65040000.9155273
1979	66410003.662109405
1980	36209999.0844727
1981	29139999.3896484
1982	32360000.6103516
1983	38580001.8310547
1984	38540000.9155273
1985	54209999.0844727
1986	55090000.1525879
1987	49659999.8474121
1988	48229999.5422363
1989	53439998.626709
1990	52049999.237060495
1991	36389999.3896484
1992	40900001.5258789
1993	50240001.6784668
1994	49939998.626709
1995	26760000.2288818
1996	30450000.762939498
1997	20069999.6948242
1998	21200000.762939498
1999	66040000.9155273
2000	26090000.1525879
2001	36150001.5258789
2002	34459999.0844727
2003	17209999.084472697
2004	8239999.77111816
2005	13590000.1525879
2006	8859999.65667725
2007	23450000.762939498
2008	23680000.3051758
2009	27729999.5422363
2010	24120000.8392334
2011	20840000.1525879
2012	27079999.9237061
2013	53669998.1689453
2014	37889999.3896484
2015	32229999.5422363
2016	40020000.4577637
2017	38240001.6784668
2018	36240001.6784668
2019	38770000.4577637
2020	73709999.0844727
2021	77250000
2022	20790000.915527303