Year	current US$
1979	4929999.82833862
1980	68629997.253418
1981	108709999.084473
1982	92870002.746582
1983	82699996.9482422
1984	81110000.6103516
1985	64720001.220703095
1986	74959999.0844727
1987	79400001.5258789
1988	52380001.0681152
1989	58540000.9155273
1990	51200000.762939505
1991	41369998.9318848
1992	59759998.3215332
1993	26459999.084472697
1994	22020000.4577637
1995	13069999.6948242
1996	12949999.8092651
1997	11699999.8092651
1998	12229999.5422363
1999	13350000.3814697
2000	12430000.3051758
2001	14779999.7329712
2002	20659999.8474121
2003	20559999.4659424
2004	23000000
2005	6599999.90463257
2006	4699999.80926514
2007	1100000.02384186
2008	1679999.94754791
2016	17930603.0273438
2017	6038129.80651855
2020	4777442.93212891