Year	US Dollars
1990	-255694325.04541
1991	-400778635.94155
1992	-272780151.0619
1993	-162600078.79325
1994	-444165259.49828
1995	-561763711.74866
1996	-523000228.3137
1997	-623026873.00723
1998	-640769081.86323
1999	-535999993.28784
2000	-519333821.71172
2001	-438107952.29345
2002	-409450074.12575
2003	-501968657.67058
2004	-556791451.8699
2005	-706671525.88374
2006	-1014567335.28763
2007	-1838053830.23985
2008	-2986491786.43355
2009	-2380771150.22904
2010	-2267574977.82078
2011	-2393250056.57704
2012	-2212354765.48421
2013	-2206270016.74944
2014	-2145601387.5752
2015	-1280887339.94911
2016	-1014735429.50691
2017	-1424254489.79981