Year	US Dollars
1990	-3686363636.36364
1991	-1140789473.68421
1992	-2112083333.33333
1993	-1310526315.78947
1994	-620845921.45015
1995	-1883423512.05116
1996	-2905611417.45053
1997	-2422991071.42857
1998	-3255407841.36999
1999	-1634187699.7326
2000	-1977336588.51168
2001	-3087333539.7956
2002	-2585962789.29058
2003	-4446174698.79518
2004	-6813739007.8745
2005	-10080001372.8249
2006	-14740227839.0887
2007	-24531886970.4302
2008	-27584382071.5392
2009	-10730397140.3273
2010	-10315806035.4322
2011	-10317194777.9309
2012	-8537742921.40015
2013	-1485922052.9463
2014	-877970858.71253
2015	-1105549591.83162
2016	-1689618644.0678
2017	-4503096853.79395