Year	current US$
1960	31000000
1961	129000000
1962	46000000
1963	19000000
1964	-7000000
1965	7159999.84741211
1966	-8539999.96185303
1967	-2730000.01907349
1968	-9119999.88555908
1969	-4000000
1970	-8000000
1971	-15000000
1972	-8000000
1973	-15000000
1974	-13000000
1975	-13000000
1976	-14000000
1977	-11000000
1978	-8000000
1979	-8000000
1988	-4000000
1991	-25000000
1996	-21000000
2002	230000.004172325
2003	529999.971389771
2004	4750000
2005	3789999.96185303
2006	2299999.95231628
2007	2190000.05722046
2008	2700000.04768372
2009	730000.019073486
2010	1559999.9427795399
2011	1309999.9427795399
2012	949999.988079071
2013	589999.973773956
2014	1039999.96185303
2015	670000.016689301
2016	3319999.9332428
2017	479999.989271164
2018	5480000.01907349
2019	1389999.98569489