Year	US Dollars
1990	117453432917.89598
1991	126945801468.06801
1992	131866807328.89999
1993	132355753109.40498
1994	135897174999.38498
1995	145378269764.36798
1996	150506401413.77798
1997	158972631460.80402
1998	168567638781.12997
1999	180171539199.74799
2000	190612243601.47598
2001	198596322075.75198
2002	208512012688.94696
2003	215220454945.37601
2004	221854972720.72897
2005	235163261619.33798
2006	251221638173.48105
2007	262332091223.28003
2008	270235611838.754
2009	269441540347.48203
2010	279293643234.04004
2011	277286324614.85901
2012	271419092894.26096
2013	287821374657.94611
2014	293878003275.35803
2015	297492796943.20892
2016	308962912144.17401
2017	318855088983.11499