Year	US Dollars
1960	10550000.19073
1961	5340000.15259
1962	15579999.92371
1963	34569999.69482
1964	81199996.94824
1965	79230003.35693
1966	25950000.76294
1967	23819999.69482
1968	15659999.84741
1969	27879999.16077
1970	53270000.45776
1971	98620002.74658
1972	123089996.33789
1973	64980003.35693
1974	18120000.83923
1975	415809997.55859
1976	73239997.86377
1977	254610000.61035
1978	190449996.94824
1979	69980003.35693
1980	27590000.15259
1981	636280029.29688
1982	10109999.65668
1983	17629999.16077
1984	-1879999.99523
1985	48599998.47412
1986	50770000.45776
1987	122150001.52588
1988	16360000.61035
1989	25319999.69482
1990	98849998.47412
1991	890210021.97266
1992	189330001.83105
1993	244770004.27246
1994	378519989.01367
1995	453839996.33789
1996	463920013.42773
1997	305029998.7793
1998	167460006.71387
1999	113080001.83106
2000	160119995.11719
2001	199869995.11719
2002	171220001.2207
2003	3096219970.70313
2004	5787200195.3125
2005	26313089843.75
2006	10488830078.125
2007	10135620117.1875
2008	10058230468.75
2009	3225919921.875
2010	2420260009.76563
2011	1994839965.82031
2012	1273920043.94531
2013	1535449951.17188
2014	1346099975.58594
2015	1609099975.58594
2016	2435550048.82813
2017	3066870117.1875
2018	2337159912.10938
2019	2139030029.29688
2020	2359449951.17188
2021	1721599975.58594