Year	current US$
1990	3943603.12689363
1991	3966515.93100756
1992	3980911.82073935
1993	3512050.16912672
1994	3320115.67651256
1995	3317491.21949772
1996	3292952.14581771
1997	2941949.72627619
1998	3080177.4329909
1999	3091149.45273842
2000	2996392.46121873
2001	2523535.80993943
2002	2834334.38392346
2003	3300026.2298305
2004	3624558.19396001
2005	4173450.58046108
2006	4210802.62120556
2007	4873226.28479173
2008	4051514.5927726
2009	3111631.39644512
2010	3229897.03192898
2011	3147226.22758121
2012	2715563.59616205
2013	2685945.18532714
2014	2940974.54509462
2015	2721274.64194898
2016	3128785.34645428
2017	3615971.08299263
2018	3801965.5923654
2019	3570231.72605674
2020	3402198.32008112
2021	3899020.55480264