Year	US Dollars
1960	70680000.30518
1961	149750000
1962	68940002.44141
1963	85290000.91553
1964	82150001.52588
1965	119239997.86377
1966	71459999.08447
1967	50770000.45776
1968	67290000.91553
1969	55189998.62671
1970	41290000.91553
1971	61380001.06812
1972	55130001.06812
1973	65949996.94824
1974	42549999.23706
1975	61599998.47412
1976	48189998.62671
1977	89650001.52588
1978	115690002.44141
1979	136020004.27246
1980	211289993.28613
1981	150750000
1982	213869995.11719
1983	172559997.55859
1984	152100006.10352
1985	168529998.7793
1986	193860000.61035
1987	122029998.7793
1988	174869995.11719
1989	169990005.49316
1990	88319999.69482
1991	150539993.28613
1992	184210006.71387
1993	306619995.11719
1994	371700012.20703
1995	264339996.33789
1996	238380004.88281
1997	165970001.2207
1998	150539993.28613
1999	106160003.66211
2000	264339996.33789
2001	519200012.20703
2002	558820007.32422
2003	432230010.98633
2004	433380004.88281
2005	379750000
2006	409959991.45508
2007	546390014.64844
2008	360630004.88281
2009	440399993.89648
2010	457000000
2011	398540008.54492
2012	425559997.55859
2013	430119995.11719
2014	848320007.32422
2015	978130004.88281
2016	742659973.14453
2017	576080017.08984
2018	514989990.23438
2019	583909973.14453
2020	840700012.20703
2021	658789978.02734