Year	current US$
1976	510045664.736604
1977	663430097.868602
1978	866461757.658798
1979	1151661597.19108
1980	1915293738.14416
1981	1834905927.10747
1982	1896187284.30084
1983	1873529275.97612
1984	1974332399.99977
1985	2100165441.54423
1986	2633435881.39257
1987	3160854027.71951
1988	3651998427.18377
1989	3906744312.85408
1990	4789774153.88531
1991	4945480873.33659
1992	5916851246.32858
1993	5645510463.88436
1994	6353474805.60933
1995	8098643439.56489
1996	8138361419.95943
1997	7695200349.33181
1998	9164972027.32371
1999	8540952834.22345
2000	7875030601.77178
2001	8400382941.93566
2002	9446983022.98044
2003	12223373125.9864
2004	14291333087.6144
2005	15318341029.0139
2006	16655492851.6356
2007	19741407530.5267
2008	24198732793.126
2009	22786681993.0657
2010	22304095622.8597
2011	24997589247.8315
2012	21724664919.3024
2013	20423865008.6999
2014	19378425512.3966
2015	17093866472.6943
2016	17567581860.9517
2017	19490485910.5367
2018	21653877829.5415
2019	21532497305.0165
2020	20059802171.2203
2021	22227522576.099