Year	US Dollars
1960	233306814.14206
1961	20373690.26822
1962	60521738.44375
1963	-108046214.1305
1964	-387744191.81171
1965	-36728332.10456
1966	-207145823.22079
1967	-106484672.48991
1968	123793784.95868
1969	89623139.62112
1970	-4102514.15353
1971	702872493.73434
1972	2268774375.17166
1973	3435258710.38941
1974	4237076071.80916
1975	4664371122.34228
1976	4872315885.981
1977	2988594055.84987
1978	2237077816.25586
1979	2386660441.61266
1980	2297224894.70184
1981	8298671818.42268
1982	8619979120.24429
1983	6924156049.72589
1984	9205356593.40659
1985	7887256634.81953
1986	9185452329.55568
1987	8252633920.8007
1988	9515222878.80477
1989	10790676400.291
1990	15722642986.8087
1991	17197150165.01649
1992	17757051754.386
1993	22647161722.8287
1994	25205601525.6084
1995	30569585506.4507
1996	27466666666.66669
1997	26712220465.3264
1998	26484114641.1908
1999	23621350948.2208
2000	26972544683.9875
2001	28411633109.6197
2002	31603613777.52679
2003	38680586907.4492
2004	51544574124.65859
2005	58891928864.5691
2006	63451260820.4742
2007	74081576786.20308
2008	80764611102.9735
2009	62873020283.41209
2010	69946828809.0892
2011	76323902167.30229
2012	79592071536.43329
2013	92700190985.86528
2014	95372254968.75549
2015	80002532075.64597
2016	85558622235.58112
2017	96509182880.26959