Year	current US$
1964	10500000
1965	10000000
1966	12699999.8092651
1967	8500000
1968	15000000
1969	12600000.3814697
1970	8800000.19073486
1971	7800000.19073486
1972	12659999.8474121
1973	15739999.7711182
1974	17010000.2288818
1975	29329999.9237061
1976	40349998.4741211
1977	28100000.3814697
1978	40279998.779296905
1979	45830001.8310547
1980	48849998.4741211
1981	36759998.3215332
1982	49470001.220703095
1983	43959999.0844727
1984	45389999.3896484
1985	33889999.3896484
1986	88650001.5258789
1987	112959999.084473
1988	55659999.8474121
1989	67690002.44140631
1990	169309997.55859402
1991	88989997.8637695
1992	67339996.3378906
1993	95860000.6103516
1994	227179992.67578098
1995	87360000.6103516
1996	211380004.882813
1997	242440002.44140598
1998	20549999.237060502
1999	20729999.5422363
2000	9810000.4196167
2001	11180000.3051758
2002	23729999.5422363
2003	18079999.9237061
2004	36099998.4741211
2005	998729980.46875
2006	123379997.253418
2007	18520000.4577637
2008	367980010.986328
2009	93150001.5258789
2010	909400024.414063
2011	61310001.373291
2012	16409999.847412098
2013	52119998.9318848
2014	27620000.8392334
2015	25860000.6103516
2016	21530000.6866455
2017	27379999.1607666
2018	54040000.9155273
2019	81760002.1362305
2020	68190002.44140631
2021	48810001.373291
2022	100120002.746582