Year	US Dollars
1991	-666384843.01141
1992	-392618767.17707
1993	-508283529.44038
1994	-396494892.90704
1995	-550866189.59467
1996	-510795582.03894
1997	-533799908.49851
1998	-622631806.06376
1999	-724837608.78562
2000	-819207599.86545
2001	-855214842.35661
2002	-828942072.28133
2003	-946369510.51302
2004	-1036642987.28168
2005	-1245690539.7086
2006	-1452546044.98101
2007	-1594553981.57209
2008	-2021005263.07537
2009	-1768917839.36582
2010	-3271999722.15055
2011	-3121287859.79682
2012	-2860489391.07513
2013	-2876849552.35094
2014	-3002875140.89983
2015	-2664244775.73825
2016	-2542494161.29727
2017	-3165752589.88422