Year	US Dollars
1990	2423314749051.31006
1991	2587942160514.97021
1992	2673268311448.70947
1993	2742392759891.4502
1994	2822695851276.96973
1995	2961083408465.28027
1996	3118274474935.59961
1997	3208977796156.86963
1998	3205013446120.27002
1999	3245588905262.50879
2000	3452953395263.80957
2001	3549332030097.2002
2002	3639730784809.41992
2003	3752140367055.70898
2004	3951946728105.86035
2005	4133438974348.17041
2006	4342658976945.83057
2007	4548909481011.58984
2008	4573202767880.07031
2009	4354111504144.26953
2010	4598281576709.0498
2011	4702730270932.62012
2012	4873844260962.8418
2013	5133797407300.40039
2014	5166025961476.01953
2015	5374340188121.31934
2016	5541130962365.59961
2017	5686343795546.20898