Year	current US$
1990	38983811736.0233
1991	34726406137.8047
1992	30216991678.2318
1993	35542109870.758
1994	67952221705.2607
1995	78580841250.2505
1996	85393420343.3103
1997	117454893863.284
1998	132878123814.81
1999	96581381705.9573
2000	94539138297.9621
2001	86064129292.6062
2002	100262153751.649
2003	118494533004.441
2004	123874074217.098
2005	152162883309.271
2006	134017594585.041
2007	144269734540.865
2008	70512945307.381
2009	5982225732.04987
2010	70522658562.0563
2011	83875037711.5328
2012	48596322203.624
2013	35572494413.8379
2014	77804842206.9408
2015	83284791382.6181
2016	65313112267.5537
2017	118586863430.09
2018	93454577308.272