Year	current US$
1960	8000000
1961	10000000
1962	8000000
1963	14000000
1964	17000000
1965	15710000.038146999
1966	11569999.6948242
1967	10930000.3051758
1968	8409999.84741211
1969	5000000
1970	17000000
1971	10000000
1972	13000000
1973	10000000
1974	6000000
1975	7000000
1976	15000000
1977	10000000
1978	4000000
1979	5000000
1980	8000000
1981	12000000
1982	19000000
1983	22000000
1984	22000000
1985	21000000
1986	17000000
1987	20000000
1988	15000000
1989	14000000
1990	17000000
1991	14000000
1992	18000000
1993	20000000
1994	20000000
1995	19000000
1996	15000000
1997	21000000
1998	16909999.8474121
1999	16659999.847412098
2000	15949999.8092651
2001	20229999.5422363
2002	32599998.4741211
2003	37799999.237060495
2004	35369998.9318848
2005	52049999.237060495
2006	61529998.779296905
2007	54029998.779296905
2008	77650001.5258789
2009	73500000
2010	51290000.9155273
2011	63799999.237060495
2012	64860000.61035161
2013	71550003.0517578
2014	75470001.2207031
2015	161380004.882813
2016	159490005.493164
2017	186970001.220703
2018	173399993.89648402
2019	150690002.44140598
2020	133179992.675781
2021	160100006.10351598
2022	129029998.779297