Year	2011 U.S. Dollars
1960-01-01	26243
1961-01-01	27081
1962-01-01	28246
1963-01-01	28971
1964-01-01	30874
1965-01-01	32344
1966-01-01	33349
1967-01-01	34366
1968-01-01	36209
1969-01-01	38314
1970-01-01	39741
1971-01-01	40800
1972-01-01	42321
1973-01-01	43815
1974-01-01	44627
1975-01-01	45379
1976-01-01	47824
1977-01-01	49313
1978-01-01	50300
1979-01-01	51395
1980-01-01	51259
1981-01-01	51469
1982-01-01	51665
1983-01-01	52959
1984-01-01	53988
1985-01-01	54480
1986-01-01	54677
1987-01-01	54680
1988-01-01	55911
1989-01-01	57020
1990-01-01	58183
1991-01-01	63557
1992-01-01	65670
1993-01-01	65853
1994-01-01	67531
1995-01-01	68418
1996-01-01	69014
1997-01-01	70317
1998-01-01	70815
1999-01-01	71073
2000-01-01	72017
2001-01-01	72917
2002-01-01	73348
2003-01-01	73709
2004-01-01	74343
2005-01-01	74963
2006-01-01	77308
2007-01-01	78504
2008-01-01	78394
2009-01-01	74344
2010-01-01	76724
2011-01-01	77978