Year	US Dollars
1990	35895225858.67131
1991	37946126994.4967
1992	39308516271.64001
1993	41893108310.76469
1994	43954726996.8515
1995	46628922266.37471
1996	48751545776.45629
1997	52134952441.20129
1998	53789935323.6059
1999	58680430470.6246
2000	62863022184.88779
2001	64807550701.9541
2002	65659093584.96461
2003	67561876926.73009
2004	76767534003.22272
2005	78692348956.0125
2006	81080343756.63118
2007	84070440689.8009
2008	83174027871.31938
2009	80992912478.64571
2010	80837943826.0359
2011	82384688997.3745
2012	85908442821.97238
2013	87364825381.29329
2014	87689842077.67731
2015	88039381571.72328
2016	85967175021.63489