Year	US Dollars adjusted for inflation)
1990	96294232757.99359
1991	85701867152.9845
1992	81159668194.78929
1993	73692978719.21858
1994	64407663403.27989
1995	59126235002.12531
1996	59421866178.36191
1997	60432037903.09401
1998	59283829183.28288
1999	60884492569.9521
2000	66851172843.1113
2001	75876081175.88571
2002	83311937132.2677
2003	91059947285.71568
2004	99801702224.8098
2005	109482467339.845
2006	121197091345.20804
2007	131983632474.92401
2008	136339092346.875
2009	137975161454.259
2010	148047348240.64304
2011	159002852010.021
2012	166634988906.55997
2013	176633088241.24197
2014	184051677947.04498
2015	186260298082
2016	188309161360.73499
2017	195841527814.47202