Year	current US$
1976	2459827648.60086
1977	2847129093.1801
1978	3240939703.80428
1979	3641202810.75269
1980	3545373467.11952
1981	4828694498.55959
1982	4570787624.12726
1983	4461850666.06287
1984	5141440696.92578
1985	4535289490.81978
1986	3340052983.97233
1987	3691640602.0852
1988	3871957670.64557
1989	3946244403.66984
1990	4122530448.30329
1991	4653311799.97664
1992	4978509843.06176
1993	5070381496.84999
1994	5275889395.40823
1995	5926309410.24283
1996	6579394776.059
1997	7065997657.26583
1998	7653476160.52126
1999	7291037028.74897
2000	7181349407.30901
2001	7060349114.8576
2002	6830884773.33814
2003	6837771186.48093
2004	7201175131.25216
2005	7636870600.09074
2006	8985631393.73208
2007	10395887625.3984
2008	13610291319.5578
2009	14560937016.4368
2010	16115928223.9213
2011	19102796512.9251
2012	20739116434.9616
2013	23523611178.6406
2014	25885822545.2938
2015	27893798723.5079
2016	29272435209.4515
2017	31357085228.886
2018	33455764585.1017
2019	34324896354.2931
2020	31346995786.8091
2021	31712478522.0832