Year	Millions of 2000 Dollars
1966-01-01	451.60200000000000
1967-01-01	503.43800000000005
1968-01-01	569.73100000000000
1969-01-01	591.24100000000000
1970-01-01	652.66599999999990
1971-01-01	889.16300000000000
1972-01-01	1033.36000000000000
1973-01-01	1197.46000000000000
1974-01-01	1560.13000000000000
1975-01-01	1839.49000000000000
1976-01-01	2892.02000000000000
1977-01-01	3227.52000000000000
1978-01-01	3645.70000000000000
1979-01-01	3359.90000000000000
1980-01-01	3792.49000000000000
1981-01-01	4717.65000000000000
1982-01-01	2645.59000000000000
1983-01-01	4937.06000000000000
1984-01-01	4582.38000000000000
1985-01-01	4817.60000000000000
1986-01-01	4669.60000000000000
1987-01-01	4892.01000000000000
1988-01-01	4874.34000000000000
1989-01-01	4865.12000000000000
1990-01-01	4054.95000000000000
1991-01-01	4847.50000000000000
1992-01-01	4939.82000000000000
1993-01-01	5083.00000000000000
1994-01-01	5246.80000000000000
1995-01-01	5496.82000000000000
1996-01-01	5485.09000000000000
1997-01-01	5816.57000000000000
1998-01-01	6683.50000000000000
1999-01-01	6777.20000000000000
2000-01-01	7225.21000000000000
2001-01-01	7772.30000000000000
2002-01-01	8376.73000000000000
2003-01-01	8744.88000000000000
2004-01-01	8820.40000000000000
2005-01-01	10404.70000000000000
2006-01-01	11658.20000000000000
2007-01-01	15603.00000000000000
2008-01-01	18656.60000000000000
2009-01-01	19217.50000000000000
2010-01-01	20924.20000000000000
2011-01-01	21013.40000000000000
2012-01-01	21490.90000000000000
2013-01-01	22909.50000000000000
2014-01-01	24218.10000000000000
2015-01-01	24751.00000000000000