Year	US Dollars
1995	46588287112.7149
1996	50670649711.23689
1997	54220075797.91949
1998	57179906056.1819
1999	57405169031.1202
2000	60868466605.4811
2001	66615959470.4763
2002	71203371695.70369
2003	72177827768.6848
2004	78367566629.66249
2005	86800350619.339
2006	98333597549.99101
2007	110361638765.27998
2008	125077405429.54398
2009	123342372223.839
2010	131692558563.26402
2011	134396740171.44299
2012	141334378505.655
2013	149610025166.76001
2014	154769445337.15701
2015	157213058726.11301
2016	163089424580.24298
2017	167988986659.32697