Year	US Dollars
1990	2472457627.11864
1991	981118631.99145
1992	1734730113.63636
1993	-1012483574.24441
1994	262629161.88289
1995	1726859602.9658
1996	1327838827.83883
1997	1516597960.51204
1998	-412745936.69803
1999	2028891763.69125
2000	6825458805.15424
2001	3379606676.58238
2002	2186614173.22835
2003	6309375000
2004	10394637923.0769
2005	17311421889.3305
2006	24875761266.7479
2007	29149374306.9856
2008	37928244524.35441
2009	10345432788.1931
2010	17577360277.8655
2011	3483090998.20291
2012	28554331457.5573
2013	3671935204.84392
2014	-18460311222.88589
2015	-9553359397.62525