Year	US Dollars
1990	218759633009.263
1991	258136517828.27298
1992	299295164749.65302
1993	326379402093.41193
1994	352284452481.35809
1995	348075314891.159
1996	373209846851.091
1997	409961396554.71204
1998	428808147190.21399
1999	419961807851.94501
2000	426027857759.80701
2001	415584811228.83197
2002	359183623079.46802
2003	403352108932.31683
2004	453888625711.51288
2005	520423058066.78894
2006	582600188768.87793
2007	656547284620.02393
2008	697524133570.43396
2009	657150616161.99219
2010	729947520649.59802
2011	794545309061.10706
2012	804832959886.58484
2013	839366658948.40076
2014	833761491687.02991
2015	852324806206.23376
2016	844707263287.91321
2017	897239263277.05579