Year	US Dollars adjusted for inflation)
2000	36044298341.09311
2001	37449372355.1551
2002	40139043103.64179
2003	41632198904.0902
2004	49633455958.9326
2005	53352370952.25689
2006	67314817504.132
2007	79421829550.18021
2008	93450549190.61479
2009	104624021240.908
2010	125122306346.15398
2011	141857635543.44699
2012	148506870584.19699
2013	155056431405.28302
2014	161225944072.686
2015	166951102638.237
2016	170662627613.43298
2017	173386627577.90195