Year	US Dollars
1960	22010000.22888
1961	21790000.91553
1962	41400001.52588
1963	129139999.38965
1964	153639999.38965
1965	317109985.35156
1966	397000000
1967	317640014.64844
1968	433019989.01367
1969	458359985.35156
1970	370850006.10352
1971	337450012.20703
1972	301220001.2207
1973	191250000
1974	146179992.67578
1975	460489990.23438
1976	224100006.10352
1977	299059997.55859
1978	330959991.45508
1979	444679992.67578
1980	446609985.35156
1981	359559997.55859
1982	364329986.57227
1983	280700012.20703
1984	561719970.70312
1985	504160003.66211
1986	751750000
1987	737080017.08984
1988	947409973.14453
1989	1176010009.76563
1990	831390014.64844
1991	1254630004.88281
1992	837750000
1993	872280029.29688
1994	705109985.35156
1995	775090026.85547
1996	809830017.08984
1997	666000000
1998	944809997.55859
1999	811229980.46875
2000	835710021.97266
2001	980679992.67578
2002	999500000
2003	1252619995.11719
2004	1607119995.11719
2005	1299260009.76563
2006	1352439941.40625
2007	1164109985.35156
2008	1258670043.94531
2009	1590819946.28906
2010	1709719970.70313
2011	1748079956.05469
2012	1747469970.70313
2013	1271349975.58594
2014	1074390014.64844
2015	1885199951.17188
2016	1413790039.0625
2017	1328689941.40625
2018	1080689941.40625
2019	934520019.53125
2020	2204219970.70313
2021	1159239990.23438