Year	current US$
1960	3700000
1961	3300000
1962	3200000
1963	3500000
1964	4300000
1965	4550000
1966	3000000
1967	2300000
1968	1700000
1969	3000000
1970	4050000
1971	4100000
1972	4900000
1973	50000
1974	7450000
1975	97900000
1976	79300000
1977	90300000
1978	117550000
1979	113150000
1980	124000000
1981	135000000
1982	122500000
1983	113000000
1984	107000000
1985	91500000
1986	73000000
1987	69500000
1988	91000000
1989	44800000
1990	27600000
1991	32300000
1992	26000000
1993	7029411.7647058815
1994	24395522.3880597
1995	49782805.42986425
1996	82203292.6202814
1997	61382500
1998	137480000
1999	111417441.86046512
2000	80082575.75757575
2001	102787155.96330275
2002	114325106.38297872
2003	150714340.63821608
2004	157278712.5091441
2005	165832804.6573759
2006	200459233.88125524
2007	236065573.7704918
2008	241165755.91985428
2009	316575591.98542804
2010	311428099.99355286
2011	405140758.873929
2012	433333333.3333334
2013	435757575.7575758
2014	425151515.1515152
2015	401649326.6683584
2016	178979968.30763748
2017	94194969.56392658
2018	94887632.32643811
2019	86199913.9393019
2020	99455532.6605201
2021	69406091.37055838
2022	91281882.13487501