Year	Millions of 2000 Dollars
1975-01-01	78.43100000000000
1976-01-01	77.82010000000000
1977-01-01	80.14730000000000
1978-01-01	93.76770000000000
1979-01-01	102.05600000000000
1980-01-01	95.09420000000000
1981-01-01	103.61100000000000
1982-01-01	112.31600000000000
1983-01-01	121.84700000000001
1984-01-01	116.75100000000000
1985-01-01	145.74100000000000
1986-01-01	166.85700000000000
1987-01-01	171.57600000000000
1988-01-01	206.94099999999997
1989-01-01	222.58900000000003
1990-01-01	238.01700000000000
1991-01-01	234.32600000000000
1992-01-01	245.52000000000000
1993-01-01	261.76900000000000
1994-01-01	272.19900000000000
1995-01-01	280.91200000000003
1996-01-01	290.35900000000004
1997-01-01	319.94400000000000
1998-01-01	356.23699999999997
1999-01-01	391.63100000000000
2000-01-01	396.82300000000004
2001-01-01	410.38699999999994
2002-01-01	419.11100000000000
2003-01-01	420.66200000000000
2004-01-01	426.65800000000000
2005-01-01	429.03900000000000
2006-01-01	438.33500000000000
2007-01-01	454.73600000000000
2008-01-01	472.81900000000000
2009-01-01	451.03000000000000
2010-01-01	456.27500000000000
2011-01-01	452.72600000000000
2012-01-01	466.74400000000000
2013-01-01	490.85900000000004
2014-01-01	529.55400000000000
2015-01-01	547.61700000000000
2016-01-01	546.57500000000000