Year	current US$
1970	13259303.7325089
1971	9434769.3130888
1972	10554824.1123145
1973	54557278.8384848
1974	95903136.4302626
1975	26623112.2100206
1976	23734296.1591853
1977	27754782.5603565
1978	21145253.3245769
1979	49442923.4888457
1980	49869827.6946005
1981	29007381.5907774
1982	29463500.7839617
1983	25069798.8240093
1984	27983157.9310072
1985	31477517.4674891
1986	9271457.75905382
1987	16885886.0159417
1988	322042749.363079
1989	258664559.255322
1990	102150211.568489
1991	43429673.7771386
1992	47733014.2400198
1993	20827356.5230824
1994	39492370.408875
1995	55591677.2624476
1996	57464843.3156806
1997	58830194.9240769
1998	23827588.5716312
1999	21194577.6718169
2000	16901571.180626
2001	13971247.1229517
2002	14266882.4885015
2003	13680278.0197604
2004	22468155.1907436
2005	49113032.4870244
2006	153124495.621658
2007	189603668.229985
2008	140062005.424997
2009	96439044.9165823
2010	124795334.127226
2011	183067311.553352
2012	180528501.254692
2013	157704816.617981
2014	113554259.004457
2015	54953706.0658976
2016	54972799.6135941
2017	76283041.5682558
2018	37589580.9067949
2019	20948553.4169869
2020	18660991.7319307
2021	62045511.0892293