Year	US Dollars adjusted for inflation)
1996	6030382461.28844
1997	6193487025.3791
1998	6328619062.00642
1999	6500140292.47834
2000	6556695399.76108
2001	6488218919.22907
2002	6471903362.415
2003	6495448169.40393
2004	6266620794.5169
2005	6379734003.44932
2006	6523228358.6981
2007	6741318083.48971
2008	6798211055.17447
2009	7007816740.32887
2010	6622541528.56888
2011	6988353355.27882
2012	7189974061.95115
2013	7494401366.58017
2014	7705005174.04483
2015	7798329610.05405
2016	7911616492.26845
2017	8004441867.12255