Year	current US$
1995	1840773809.52381
1996	1074761101.74255
1997	1432903264.16553
1998	1766303112.92888
1999	1575937312.94553
2000	1589601092.63882
2001	1823499794.02206
2002	2190129995.18536
2003	2885265770.18526
2004	3281569424.16355
2005	4017914999.04707
2006	4567562367.72911
2007	6195941217.63471
2008	6686284774.15495
2009	6615838487.23964
2010	5928252335.18343
2011	7875790970.49413
2012	7366491458.6071
2013	7050895765.47231
2014	7567019400.35273
2015	6837961913.39832
2016	7715497737.55656
2017	8547565543.07116
2018	9357151478.57574