Year	Millions of 2000 Dollars
1978-01-01	98.65740000000000
1979-01-01	119.69200000000001
1980-01-01	111.47900000000000
1981-01-01	75.22410000000000
1982-01-01	72.85740000000000
1983-01-01	69.75200000000000
1984-01-01	86.56220000000000
1985-01-01	72.53990000000000
1986-01-01	63.76350000000000
1987-01-01	81.84170000000000
1988-01-01	101.14600000000000
1989-01-01	87.95560000000000
1990-01-01	85.37270000000000
1991-01-01	94.21020000000000
1992-01-01	105.09299999999999
1993-01-01	118.81600000000000
1994-01-01	137.80000000000000
1995-01-01	141.81700000000000
1996-01-01	134.79000000000000
1997-01-01	109.14399999999999
1998-01-01	122.85400000000000
1999-01-01	124.34899999999999
2000-01-01	120.86300000000000
2001-01-01	87.90460000000000
2002-01-01	64.59960000000000
2003-01-01	77.60580000000000
2004-01-01	84.04230000000000
2005-01-01	108.92100000000000
2006-01-01	130.03200000000000
2007-01-01	159.29399999999998
2008-01-01	159.45700000000000
2009-01-01	139.91800000000000
2010-01-01	161.49100000000000
2011-01-01	215.71200000000002
2012-01-01	249.02800000000000
2013-01-01	297.82599999999996
2014-01-01	309.64599999999996
2015-01-01	311.92000000000000
2016-01-01	338.01500000000000