Year	current US$
1971	1220000.02861023
1972	9840000.15258789
1973	4059999.94277954
1974	31920000.0762939
1975	16170000.076293899
1976	7000000
1977	6440000.05722046
1978	16149999.618530298
1979	35040000.9155273
1980	13270000.4577637
1981	25840000.1525879
1982	37099998.4741211
1983	9779999.73297119
1984	31340000.1525879
1985	3900000.09536743
1986	9270000.45776367
1987	8369999.88555908
1988	11220000.2670288
1989	29000000
1990	11569999.6948242
1991	13420000.076293899
1992	7389999.8664856
1993	11199999.8092651
1994	21479999.5422363
1995	14739999.7711182
1996	17690000.5340576
1997	13789999.961853001
1998	15010000.2288818
1999	6829999.92370605
2000	18989999.7711182
2001	16239999.7711182
2002	22889999.3896484
2003	11949999.8092651
2004	24600000.3814697
2005	15090000.1525879
2006	9060000.4196167
2007	35150001.5258789
2008	45139999.3896484
2009	41360000.6103516
2010	50270000.4577637
2011	79580001.8310547
2012	120849998.47412099
2013	91910003.6621094
2014	85730003.3569336
2015	48950000.762939505
2016	34119998.9318848
2017	46740001.6784668
2018	54740001.6784668
2019	58970001.220703095
2020	79650001.5258789
2021	93059997.55859381
2022	84970001.2207031