Year	US Dollars
1990	90173428870.03941
1991	96538985485.60179
1992	104411583199.436
1993	112253689415.843
1994	119571786849.76302
1995	128221197222.213
1996	135882430542.30501
1997	144736679251.10995
1998	153919772075.46799
1999	163892752442.505
2000	176805519557.508
2001	189628872228.55997
2002	201775401847.94894
2003	215636694275.50101
2004	233836744026.06891
2005	257396117309.42102
2006	286280384760.51501
2007	316953726021.66602
2008	346729842470.25793
2009	367777580705.1449
2010	393637572048.04602
2011	427013979840.34692
2012	465580517217.89606
2013	499607684967.53394
2014	532517270719.17902
2015	572635358205.33691
2016	616925857648.3988
2017	664453315664.80603