Year	current US$
1964	12000000
1965	12800000.1907349
1966	8800000.19073486
1967	8100000.38146973
1968	6000000
1969	6099999.90463257
1970	6300000.19073486
1971	8399999.61853027
1972	6869999.88555908
1973	7889999.8664856
1974	8670000.07629395
1975	13859999.6566772
1976	9899999.61853027
1977	10199999.8092651
1978	13279999.7329712
1979	18530000.6866455
1980	16750000
1981	19190000.5340576
1982	14239999.7711182
1983	14020000.4577637
1984	16379999.160766602
1985	13369999.8855591
1986	25620000.8392334
1987	23899999.6185303
1988	39610000.6103516
1989	83669998.1689453
1990	66690002.44140631
1991	83889999.3896484
1992	35790000.9155273
1993	45569999.6948242
1994	56400001.5258789
1995	54270000.4577637
1996	44259998.3215332
1997	26579999.9237061
1998	28770000.4577637
1999	27579999.9237061
2000	74250000
2001	42520000.4577637
2002	40490001.6784668
2003	36759998.3215332
2004	62860000.6103516
2005	42720001.220703095
2006	73750000
2007	56400001.5258789
2008	66410003.662109405
2009	50389999.3896484
2010	48790000.9155273
2011	41540000.9155273
2012	41409999.8474121
2013	37889999.3896484
2014	36509998.3215332
2015	27860000.6103516
2016	27620000.8392334
2017	42330001.8310547
2018	47540000.9155273
2019	38110000.6103516
2020	68480003.3569336
2021	84690002.44140631
2022	100480003.35693401