Year	current US$
1960	17149957.125107188
1961	17908288.562611926
1962	16916624.375105727
1963	16449958.87510281
1964	19658284.187622864
1965	22000000
1966	27470588.23529412
1967	29647058.82352941
1968	27150000
1969	30350000
1970	32799999.999999996
1971	32850000
1972	32666666.666666664
1973	32571428.57142857
1974	38590909.090909086
1975	37500000
1976	39120000
1977	42120000
1978	52800000
1979	58800000
1980	68800000
1981	88214285.71428572
1982	65333333.333333336
1983	89333333.33333333
1984	68157894.73684211
1985	73023255.81395349
1986	77441860.46511628
1987	48265306.12244897
1988	53800000
1989	46176470.5882353
1990	46835443.037974685
1991	47799642.21824687
1992	50703437.25019984
1993	73671274.96159755
1994	88698481.56182212
1995	101014084.50704226
1996	119515669.51566951
1997	118917704.22960512
1998	116470345.93639341
1999	104327014.9102799
2000	120190758.09899688
2001	113094735.17021997
2002	108490913.38210998
2003	107299251.43311398
2004	130224020.77581534
2005	136287179.4871795
2006	115553201.09489098
2007	182236755.1030628
2008	164167621.810718
2009	208894336.8472665
2010	231030066.3046862
2011	255600622.49561924
2012	277576153.4519858
2013	322399613.22757524
2014	338887296.1642902
2015	334019370.46004844
2016	357661016.9491525
2017	406987893.46246976
2018	479484874.46122944
2019	556143884.8920864
2020	387117505.99520385
2021	532436450.8393285
2022	536470023.98081535