Year	current US$
1990	8361143.30352827
1991	8710292.38619982
1992	9645077.60638054
1993	9815416.45032299
1994	10250580.0670301
1995	10853870.2698766
1996	12256322.8142506
1997	12417075.3537282
1998	12496979.4070187
1999	13313255.6305656
2000	15034905.1189744
2001	20183114.5524138
2002	17734430.4041547
2003	22063526.0217808
2004	32431781.3623001
2005	30013456.7540264
2006	33842828.4704073
2007	32449092.4006252
2008	26032608.257002
2009	26788953.4652259
2010	33150760.4553074
2011	33109510.0695931
2012	32002149.1075551
2013	36527686.0822568
2014	43435275.1899887
2015	47986489.9901633
2016	54585561.8259427
2017	61738202.2622292
2018	63861355.2114907
2019	66469640.6705854
2020	58194833.457784
2021	60081059.9672031