Year	current US$
1960	6000000
1961	11000000
1962	12000000
1963	14000000
1964	17000000
1965	17319999.6948242
1966	22049999.237060502
1967	22899999.6185303
1968	12649999.6185303
1969	10000000
1970	9000000
1971	10000000
1972	8000000
1973	13000000
1974	8000000
1975	6000000
1976	11000000
1977	5000000
1978	1000000
1979	2000000
1981	1000000
1982	3000000
1983	9000000
1984	28000000
1985	44000000
1986	50000000
1987	43000000
1988	30000000
1989	15000000
1990	27000000
1991	22000000
1992	21000000
1993	19000000
1994	21000000
1995	13000000
1996	12000000
1997	13000000
1998	4409999.84741211
1999	14000000
2000	47060001.373291
2001	55200000.762939505
2002	65029998.779296905
2003	72589996.3378906
2004	74480003.3569336
2005	71330001.8310547
2006	70139999.3896484
2007	42659999.8474121
2008	46360000.6103516
2009	52069999.6948242
2010	23139999.3896484
2011	31079999.9237061
2012	25590000.1525879
2013	24940000.5340576
2014	32220001.220703095
2015	14670000.076293899
2016	18120000.8392334
2017	16620000.839233398
2018	17309999.4659424
2019	29940000.5340576
2020	56979999.5422363
2021	70769996.6430664
2022	74730003.3569336