Year	2011 U.S. Dollars
1960-01-01	28540
1961-01-01	29919
1962-01-01	31025
1963-01-01	32515
1964-01-01	34242
1965-01-01	35306
1966-01-01	35994
1967-01-01	37607
1968-01-01	38566
1969-01-01	39750
1970-01-01	41510
1971-01-01	41984
1972-01-01	42805
1973-01-01	44337
1974-01-01	44865
1975-01-01	45120
1976-01-01	45441
1977-01-01	44625
1978-01-01	45238
1979-01-01	46301
1980-01-01	46570
1981-01-01	46402
1982-01-01	47044
1983-01-01	47786
1984-01-01	49416
1985-01-01	49983
1986-01-01	51097
1987-01-01	52445
1988-01-01	53114
1989-01-01	53805
1990-01-01	53852
1991-01-01	54058
1992-01-01	55895
1993-01-01	57766
1994-01-01	60719
1995-01-01	62108
1996-01-01	63543
1997-01-01	66183
1998-01-01	67797
1999-01-01	69459
2000-01-01	70869
2001-01-01	70289
2002-01-01	71999
2003-01-01	74084
2004-01-01	77743
2005-01-01	80008
2006-01-01	82071
2007-01-01	82913
2008-01-01	81634
2009-01-01	79432
2010-01-01	83454
2011-01-01	84816