Year	US Dollars
1961	819999.99285
1962	5250000
1963	83790000.91553
1964	88470001.2207
1965	101190002.44141
1966	60650001.52588
1967	35569999.69482
1968	28200000.76294
1969	51419998.16895
1970	35689998.62671
1971	25030000.68665
1972	16840000.15259
1973	10090000.15259
1974	14630000.11444
1975	16639999.38965
1976	14810000.41962
1977	6929999.82834
1978	9579999.92371
1979	8930000.30518
1980	8750000
1981	-5849999.90463
1982	12100000.38147
1983	15300000.19073
1984	13760000.22888
1985	21149999.61853
1986	42409999.84741
1987	62299999.23706
1988	11010000.22888
1989	7969999.79019
1990	25930000.30518
1991	-3000000
1992	8760000.22888
1993	2190000.05722
1994	28440000.53406
1995	30770000.45776
1996	19559999.46594
1997	47360000.61035
1998	20780000.68665
1999	38950000.76294
2000	-4590000.15259
2001	-11760000.22888
2002	-16200000.76294
2003	-4510000.22888
2004	-1649999.97616
2005	-2809999.94278
2006	13430000.30518
2007	20120000.83923
2008	8539999.96185
2009	6630000.11444
2010	4449999.80927