Year	current US$
1998	3073220.1880035
1999	3488087.96470106
2000	3598219.39059342
2001	2260202.58097896
2002	3125366.32807303
2003	4685047.13077152
2004	6293002.21846632
2005	7612124.57070404
2006	9189895.18919706
2007	13814581.2981694
2008	15416676.935083
2009	15698903.2703034
2010	13298353.9998634
2011	18287688.9483582
2012	7217178.03553904
2013	11132443.0802549
2014	10796246.5992464
2015	11733970.0615714
2016	9377976.11613136
2017	12233731.8098722
2018	12160514.9975584
2019	12527694.7093036
2020	11584550.9849278
2021	10105632.8809571