Year	current US$
1990	3266662335.89152
1991	3689065010.62581
1992	3907328105.87372
1993	4216001805.88373
1994	4781163416.97902
1995	4690706413.53371
1996	5136513470.33593
1997	5670133289.52644
1998	6250886384.49152
1999	6304802846.48573
2000	7038191756.8058
2001	7351893544.12588
2002	7778966105.79173
2003	8503703623.91306
2004	9136054829.04199
2005	10055439016.5754
2006	10994014233.7584
2007	11772324660.3179
2008	12333282942.1303
2009	12382848020.7441
2010	13228011010.0101
2011	14269900190.1589
2012	15114025491.6865
2013	15378478843.7057
2014	15563970366.9504
2015	16399904772.8772
2016	16997297670.2429
2017	17645152130.0068
2018	17731125202.6672
2019	18320745289.0655
2020	16954463382.2282
2021	18419077893.2811