Year	US Dollars
1960	-1370752.50722
1961	-7695361.3735
1962	-19483980.29663
1963	-5928145.21803
1964	-28161571.04191
1965	-30509108.5522
1966	-25514696.44869
1967	-39571032.4637
1968	-40621742.11428
1969	-44532899.60094
1970	-47627899.25294
1971	-22424784.23426
1972	-46653263.37274
1973	-77795207.21506
1974	-171389680.79975
1975	-123191032.83097
1976	-128531628.09871
1977	-125102609.61732
1978	-94006813.91446
1979	-175703830.73463
1980	-339700643.12882
1981	-261498556.47947
1982	-305203436.45268
1983	-109798271.16562
1984	-59400448.6028
1985	-175098830.7517
1986	-13165797.92605
1987	-97775904.83156
1988	-120600728.82764
1989	-146000778.03618
1990	-168460557.51607
1991	-108879802.65637
1992	-25363799.7097
1993	-39445795.7536
1994	-161756502.42154
1995	-133821925.50352
1996	-145439646.06558
1997	-144268313.53503
1998	-177307705.47696
1999	-147986248.47754
2000	-141940117.95055
2001	-149563767.79664
2002	-229586383.2415
2003	-261897412.9917
2004	-321830194.6223
2005	-483695601.68662
2006	-477595578.87977
2007	-536315054.5792
2008	-970296689.20846
2009	-1432123295.40268
2010	-1537939375.33946
2011	-1723071439.12224
2012	-1215074185.09223
2013	-1261013182.69543
2014	-1502448491.28365
2015	-1629496665.01808
2016	-1295879278.4412
2017	-1326753531.3661