Year	US Dollars
1989	-333066666.66667
1990	-215963870.96774
1991	-456824742.26804
1992	-645680000
1993	-481797385.62092
1994	-494544196.42857
1995	-490630039.84064
1996	-637124339.06343
1997	-841400133.36015
1998	-850332079.64393
1999	-1237095393.73412
2000	-1076735563.43578
2001	-1059109730.87966
2002	-1065583389.47368
2003	-1105211387.71186
2004	-1221451079.72379
2005	-1446414000.8247
2006	-1675795219.12351
2007	-1996783424.12662
2008	-2366665056.08639
2009	-1579293306.12847
2010	-1701785263.43391
2011	-2130165476.73729
2012	-2131565111.03467
2013	-2257623412.39665
2014	-1981901421.09257
2015	-2316801968.68304
2016	-2227096070.5251
2017	-1961235652.53273