Year	Millions of 2000 Dollars
1971-01-01	46.24700000000000
1972-01-01	58.85240000000000
1973-01-01	59.51660000000000
1974-01-01	55.41670000000000
1975-01-01	57.77610000000000
1976-01-01	66.50000000000000
1977-01-01	81.78530000000000
1978-01-01	91.09430000000000
1979-01-01	105.56100000000000
1980-01-01	123.43299999999999
1981-01-01	117.38400000000000
1982-01-01	100.66600000000000
1983-01-01	97.29550000000000
1984-01-01	97.62640000000000
1985-01-01	118.49300000000000
1986-01-01	146.76500000000000
1987-01-01	177.79900000000000
1988-01-01	198.11700000000002
1989-01-01	219.36500000000000
1990-01-01	250.79800000000000
1991-01-01	274.85800000000000
1992-01-01	294.84000000000000
1993-01-01	354.81400000000000
1994-01-01	434.30100000000000
1995-01-01	495.03700000000000
1996-01-01	533.30099999999990
1997-01-01	593.96600000000000
1998-01-01	636.25200000000000
1999-01-01	747.69200000000000
2000-01-01	647.98900000000000
2001-01-01	783.07000000000000
2002-01-01	960.42200000000000
2003-01-01	912.85300000000010
2004-01-01	1007.73000000000000
2005-01-01	990.53400000000000
2006-01-01	944.51800000000000
2007-01-01	605.14300000000000
2008-01-01	373.43300000000005
2009-01-01	577.24300000000000
2010-01-01	598.85200000000000
2011-01-01	537.52400000000000
2012-01-01	544.92300000000000
2013-01-01	727.43700000000000
2014-01-01	786.25500000000000
2015-01-01	857.47700000000000
2016-01-01	917.38100000000010