Year	US Dollars
1960	28780000.68665
1961	14930000.30518
1962	45610000.61035
1963	76809997.55859
1964	378350006.10352
1965	384709991.45508
1966	347959991.45508
1967	316769989.01367
1968	345739990.23438
1969	310760009.76562
1970	322920013.42773
1971	297769989.01367
1972	311880004.88281
1973	248729995.72754
1974	275989990.23438
1975	311850006.10352
1976	229779998.7793
1977	206259994.50684
1978	269790008.54492
1979	345630004.88281
1980	527799987.79297
1981	575169982.91016
1982	611500000
1983	474679992.67578
1984	415440002.44141
1985	494519989.01367
1986	646559997.55859
1987	594250000
1988	491850006.10352
1989	599429992.67578
1990	600280029.29688
1991	654520019.53125
1992	496709991.45508
1993	500890014.64844
1994	385470001.2207
1995	366420013.42773
1996	440799987.79297
1997	1168390014.64844
1998	679320007.32422
1999	496239990.23438
2000	473339996.33789
2001	572719970.70312
2002	550219970.70312
2003	696950012.20703
2004	1442790039.0625
2005	1039510009.76563
2006	868659973.14453
2007	918760009.76562
2008	822010009.76562
2009	435600006.10352
2010	483489990.23438
2011	425190002.44141
2012	359029998.7793
2013	479890014.64844
2014	562510009.76562
2015	730020019.53125
2016	668599975.58594
2017	817179992.67578
2018	760359985.35156
2019	750650024.41406
2020	1298459960.9375
2021	992080017.08984