Year	2010 U.S. Dollars
1977-01-01	4049.73964079832
1978-01-01	4250.24928196879
1979-01-01	4593.78386224157
1980-01-01	5002.58482384730
1981-01-01	5086.49733339875
1982-01-01	5136.19745540208
1983-01-01	5227.08040203767
1984-01-01	5711.06140832965
1985-01-01	6244.51112800746
1986-01-01	6957.73684984823
1987-01-01	7461.42334718455
1988-01-01	8231.44738623294
1989-01-01	8737.69726363075
1990-01-01	9169.08224207045
1991-01-01	8932.93892793854
1992-01-01	9236.65142854062
1993-01-01	9769.15991801411
1994-01-01	10160.25427319170
1995-01-01	10614.98993353190
1996-01-01	11114.89831374040
1997-01-01	11753.24490001250
1998-01-01	11550.73425296590
1999-01-01	11807.05456421380
2000-01-01	12911.31434394460
2001-01-01	13434.37428339250
2002-01-01	13588.91802414250
2003-01-01	12913.53267424040
2004-01-01	13193.81119611070
2005-01-01	14162.15457573830
2006-01-01	14243.26741895000
2007-01-01	14054.47230206140
2008-01-01	14775.82207283870
2009-01-01	14173.57874113720
2010-01-01	13704.25445369560
2011-01-01	13881.60577616130
2012-01-01	13644.75396332340
2013-01-01	14335.88509388000
2014-01-01	15029.61653518560
2015-01-01	15469.21325158130
2016-01-01	15657.22405682560
2017-01-01	15779.31964055040