Year	US Dollars
1989	-53920829.97531
1990	-877295839.29457
1991	1681537695.27056
1992	1472159749.66168
1993	-205438156.60989
1994	-1663879222.63865
1995	-1486528763.26006
1996	-1137470098.69396
1997	-1534082564.88622
1998	-952439118.2152
1999	1722999997.21474
2000	1572910505.3591
2001	618194002.34545
2002	1856906844.89167
2003	1288090460.74221
2004	4874976499.34198
2005	721408082.42433
2006	-3067920792.0792
2007	-7876039603.9604
2008	-14377468104.4957
2009	-1963240579.11489
2010	-5485785573.86965
2011	-10783422862.5935
2012	-36838192967.088
2013	-16930939572.1256
2014	-4680441165.33605
2015	-1717121315.46783
2016	-5811915636.38641
2017	-7088086447.13987