Year	current US$
1996	16181268700
1997	16210808100
1998	17130031200
1999	19036715200
2000	20347200000
2001	21381200000
2002	23312900000
2003	25388700000
2004	27296800000
2005	31109041300
2006	35782870370.37037
2007	39307129629.62962
2008	40719444444.44444
2009	41647222222.22222
2010	43164814814.81481
2011	50367000000
2012	52411000000
2013	55369000000
2014	58786000000
2015	63396500000
2016	65831000540
2017	68586800000
2018	70249547343.8
2019	72819000000
2020	78914500000