Year	2011 U.S. Dollars
1960-01-01	12101
1961-01-01	13348
1962-01-01	14311
1963-01-01	15437
1964-01-01	16942
1965-01-01	17619
1966-01-01	19035
1967-01-01	20745
1968-01-01	22835
1969-01-01	25372
1970-01-01	27684
1971-01-01	28696
1972-01-01	30950
1973-01-01	32697
1974-01-01	32433
1975-01-01	33518
1976-01-01	34568
1977-01-01	35657
1978-01-01	37175
1979-01-01	38814
1980-01-01	39636
1981-01-01	40980
1982-01-01	42020
1983-01-01	42660
1984-01-01	44413
1985-01-01	46972
1986-01-01	48056
1987-01-01	49832
1988-01-01	52781
1989-01-01	54808
1990-01-01	56912
1991-01-01	57632
1992-01-01	57456
1993-01-01	57337
1994-01-01	57767
1995-01-01	58701
1996-01-01	60188
1997-01-01	60726
1998-01-01	60219
1999-01-01	60937
2000-01-01	62703
2001-01-01	63406
2002-01-01	64357
2003-01-01	65422
2004-01-01	66589
2005-01-01	66983
2006-01-01	67827
2007-01-01	69007
2008-01-01	68605
2009-01-01	65844
2010-01-01	69087
2011-01-01	68537