Year	current US$
1992	2679188.22399459
1993	2804404.70009228
1994	2928737.16200859
1995	3057428.24503566
1996	3183460.47123392
1997	3311220.09432752
1998	3423829.97452567
1999	3550201.50148417
2000	3897938.36417854
2001	4269505.00147215
2002	4433607.60103868
2003	4622834.20849898
2004	5074360.3424941
2005	6049223.79889597
2006	6130947.2078525
2007	6180779.41351115
2008	5635925.15674458
2009	5523495.47923093
2010	6001430.75739706
2011	6263961.08822075
2012	6835410.64182063
2013	7111584.89244492
2014	7407566.4903836
2015	7302291.75226838
2016	8977888.57087194
2017	9728443.77657117
2018	9794686.41078366
2019	10194730.1940237
2020	9680047.85714166
2021	9039777.61512874