Year	2011 U.S. Dollars
1976-01-01	30235
1977-01-01	31194
1978-01-01	31942
1979-01-01	32792
1980-01-01	34207
1981-01-01	36664
1982-01-01	38337
1983-01-01	40659
1984-01-01	43976
1985-01-01	44911
1986-01-01	46246
1987-01-01	49105
1988-01-01	51893
1989-01-01	54640
1990-01-01	54565
1991-01-01	58588
1992-01-01	60642
1993-01-01	66933
1994-01-01	71439
1995-01-01	74262
1996-01-01	75414
1997-01-01	77238
1998-01-01	73762
1999-01-01	78016
2000-01-01	82090
2001-01-01	79116
2002-01-01	82880
2003-01-01	87400
2004-01-01	94120
2005-01-01	96933
2006-01-01	99095
2007-01-01	99391
2008-01-01	92962
2009-01-01	88036
2010-01-01	98489
2011-01-01	99415