Year	US Dollars
1960	-96236769.89416
1961	-111296223.70312
1962	-85946687.5735
1963	-133738403.24056
1964	-97118776.95022
1965	-107866196.2629
1966	-79184633.47707
1967	-90977394.48582
1968	-78139291.781
1969	-156801254.41004
1970	-365020253.49536
1971	-461126355.67751
1972	-423869931.49113
1973	-334720000
1974	-784365589.6476
1975	-525462677.99253
1976	-438999704.80327
1977	-97013113.16173
1978	-280027875.70714
1979	-525813544.41513
1980	-823737698.88715
1981	-483794134.13039
1982	-294693993.46807
1983	103878504.6729
1984	-38570752.48462
1985	57428156.20458
1986	489841370.84678
1987	620924037.8433
1988	2425783475.78348
1989	3356887298.74776
1990	3633543557.40143
1991	6003531114.32705
1992	6328422344.99693
1993	5990592895.16027
1994	11915935576.7972
1995	14676802596.3031
1996	15628510638.2979
1997	14443292025.8621
1998	18260038240.9178
1999	14520176991.1505
2000	11779524361.949
2001	14472958642.6299
2002	16227465653.9707
2003	26685512570.3134
2004	30100757306.8276
2005	37978070175.4386
2006	44074642834.6655
2007	55401035100.52419
2008	39954484415.85971
2009	45031488484.01521
2010	61588778877.88779
2011	73934011766.57661
2012	68100104024.96601
2013	68416207144.5696
2014	72567042853.76062
2015	78261128891.47508
2016	80934563879.84079
2017	78587298138.89488