Year	US Dollars
1990	15051002011.1413
1991	16114610608.6881
1992	18006980402.6694
1993	19744490916.9759
1994	21313932246.3618
1995	22488302495.2286
1996	23270433833.6052
1997	24884903722.26509
1998	26506197304.03689
1999	25252275143.7015
2000	29270850664.21361
2001	31002140030.27001
2002	32514668894.43909
2003	34581246236.27981
2004	37196583075.7056
2005	40030519515.3662
2006	44645916459.9005
2007	49840707939.4836
2008	53555404952.59709
2009	52688035547.7114
2010	56015840940.10521
2011	59533347305.9305
2012	63684238715.4011
2013	65808698665.2766
2014	69160980184.0314
2015	72224039225.34689
2016	76060537208.7468
2017	78997686018.89548