Year	US Dollars
1990	354253652169.77295
1991	403864985932.20599
1992	438430342958.76892
1993	479488426234.58905
1994	534136418108.48206
1995	596858189954.51514
1996	654087166606.85791
1997	703286650897.17407
1998	666890448678.82605
1999	755278990079.87903
2000	843935306788.96094
2001	902537346911.56201
2002	985828020535.79993
2003	1019714022540.62048
2004	1101100253872.47998
2005	1156781985289.2998
2006	1246381845745.38989
2007	1350407461950.59009
2008	1405611759231.3501
2009	1393108423291.55005
2010	1506811930586.5603
2011	1568631167033.90015
2012	1627811703472.46021
2013	1656512685183.13989
2014	1709830640018.38965
2015	1800807016409.19995
2016	1882180197226.84009
2017	1973042453344.53027