Year	US Dollars adjusted for inflation)
1986	3787773945.56479
1987	3912769287.8791
1988	4429256009.91502
1989	4552821220.90936
1990	4812459356.30362
1991	4434630008.43214
1992	3818717157.80783
1993	3228369274.14683
1994	2579946186.09508
1995	2440014495.994
1996	2612877381.97909
1997	2871948567.00573
1998	2932886588.13922
1999	3040106750.30941
2000	3205083428.31668
2001	3375644644.52149
2002	3375058863.31317
2003	3612335496.27933
2004	3866169244.16652
2005	3859382252.51029
2006	3979134973.9144
2007	4319067496.68377
2008	4681938960.69465
2009	4817073516.79672
2010	4794357795.07139
2011	5079922899.93883
2012	5075444938.11057
2013	5629453576.20745
2014	5855984962.71161
2015	6082952722.9673
2016	6346700787.57926
2017	6637610601.9034