Year	current US$
1981	4009588743.961353
1982	4104840289.8550725
1983	4658969855.072464
1984	3877987826.086957
1985	4984878792.270532
1986	5021443719.806764
1987	5171530869.565218
1988	5300985024.15459
1989	5553624347.826087
1990	6025641980.676329
1991	7898721400.966185
1992	6697817698.483497
1993	5293597069.082566
1994	3650991925.0255046
1995	3979501295.3367877
1996	4373584856.686134
1997	4640676242.074375
1998	3835760824.1886063
1999	3502759775.792515
2000	3681529359.699426
2001	3485190446.456447
2002	3037664391.8199162
2003	3215348079.9487205
2004	3918718405.94002
2005	5106106985.991031
2006	6498059682.751789
2007	8329426631.794405
2008	12230064939.420164
2009	14883148075.631058
2010	12406604219.99845
2011	13180503225.80645
2012	19200051115.618664
2013	19649913667.423775
2014	21422080397.5843
2015	23288958300.428123
2016	25780138164.445667
2017	27621617366.255974
2018	26307832617.027103
2019	32258602964.725952
2020	38281227166.87402
2021	41811231713.495544
2022	47720070266.9505
2023	58587159452.72321