Year	current US$
1976	2701834249.9999995
1977	3161916449.9999995
1978	3646143050
1979	4324523616.65
1980	4181951520
1981	5404754240
1982	5182590101.562501
1983	5052570112.068966
1984	5754435997.130102
1985	5004377399.671385
1986	3649842948.8053327
1987	4045923622.162201
1988	4332811687.902778
1989	4456873579.83834
1990	4618982620.207083
1991	5096262338.686614
1992	5446168777.113393
1993	5528799392.649569
1994	5798722891.832233
1995	6508561764.974246
1996	7188749149.688685
1997	7729236782.815004
1998	8335294701.597947
1999	8088864460.306297
2000	8172325473.005601
2001	7930357003.122636
2002	7700785216.178522
2003	7780552284.602229
2004	8388731804.435485
2005	9172769524.9553
2006	11054601174.769089
2007	12630670333.176458
2008	16137900474.433228
2009	16666184074.074076
2010	18760785455.544632
2011	22977403393.5893
2012	25455219536.903038
2013	28751567785.817654
2014	31298228306.801735
2015	31873100506.5123
2016	33320230246.02026
2017	36398995788.71201
2018	39311992850.94067
2019	40059428639.65268
2020	36212843806.07815
2021	39377111693.198265
2022	42734282879.884224
2023	44844197818.83532