Year	current US$
1977	9249999.98696148
1979	0
1980	22529999.922961
1981	21450000.345706902
1982	21940000.0497699
1983	24750000.0689179
1984	23829999.5753914
1985	25589999.6757507
1986	24400000.2592802
1987	26659999.9591708
1988	33579999.782145
1989	42040000.3194809
1990	52770000.4130602
1991	56100000.1505017
1992	37629999.7214228
1993	38449999.9824911
1994	58319999.6780604
1995	75849999.3681908
1996	68570000.1940131
1997	75059999.4473159
1998	74140000.1235306
1999	63030000.1204014
2000	49470000.401139304
2001	75560000.166297
2002	98189999.6995926
2003	95540000.6696582
2004	85849999.90090731
2005	83849999.84316531
2006	90549999.7064471
2007	96910000.3167987
2008	141369999.90045998
2009	146879999.637604
2010	144979999.67075902
2011	141189998.14614698
2012	148762388.19584298
2013	148793198.250234
2014	147823358.80398798
2015	139009645.12676
2016	118845194.786787
2017	102217980.98087299
2018	97787110.2020144
2019	130880466.82626
2020	154556931.063533
2021	158549123.04878202
2022	170061371.5350628