Year	US Dollars
1960	220729995.72754
1961	369000000
1962	352089996.33789
1963	209500000
1964	-41349998.47412
1965	-453880004.88281
1966	-115849998.47412
1967	62279998.7793
1968	-39450000.76294
1969	52509998.32153
1970	-33930000.30518
1971	28719999.31335
1972	6170000.07629
1973	62439998.62671
1974	66010002.13623
1975	43900001.52588
1976	51270000.45776
1977	52490001.67847
1978	44009998.32153
1979	66709999.08447
1980	98099998.47412
1981	91379997.25342
1982	77650001.52588
1983	91089996.33789
1984	88940002.44141
1985	106489997.86377
1986	149179992.67578
1987	141399993.89648
1988	232919998.16895
1989	338000000
1990	246320007.32422
1991	381660003.66211
1992	341290008.54492
1993	356730010.98633
1994	227039993.28613
1995	167830001.83105
1996	152589996.33789
1997	132389999.38965
1998	96620002.74658
1999	99010002.13623
2000	89669998.16895
2001	253229995.72754
2002	153580001.83105
2003	152690002.44141
2004	111250000
2005	104989997.86377
2006	124709999.08447
2007	91940002.44141
2008	117029998.7793
2009	110019996.64307
2010	122639999.38965
2011	91500000
2012	174750000
2013	34669998.16895
2014	47020000.45776
2015	-18639999.38965
2016	3359999.8951
2017	-540000.02146
2018	74540000.91553
2019	9000000
2020	101699996.94824
2021	145440002.44141