Year	US Dollars
1960	-9239815.2037
1961	-11759764.8047
1962	-13999720.0056
1963	-16939661.20678
1964	-17779644.40711
1965	-20719585.60829
1966	-25899482.01036
1967	-26459470.81058
1968	-26459470.81058
1969	-25059498.81002
1970	-25199496.01008
1971	-32158836.68904
1972	-42929621.43879
1973	-64841498.55908
1974	-95658572.47976
1975	-133874239.35091
1976	-178242870.28519
1977	-194342226.31095
1978	-195492180.31279
1979	-294536817.10214
1980	-384437596.302
1981	-424273504.2735
2007	-984907301.21782
2008	-976916598.07292
2009	-1207621700.08379
2010	-1471302423.10004
2011	-1401701078.34901
2012	-1650965736.90621
2013	-1345269795.12515
2014	-1220362768.91301
2015	-1036826668.56455
2016	-936872457.55662