Year	Millions of 2000 Dollars
1972-01-01	601.477
1973-01-01	640.128
1974-01-01	1042.190
1975-01-01	1348.980
1976-01-01	1794.580
1977-01-01	2110.690
1978-01-01	2161.590
1979-01-01	2037.050
1980-01-01	2389.770
1981-01-01	3042.480
1982-01-01	3711.620
1983-01-01	4413.480
1984-01-01	4664.350
1985-01-01	5439.730
1986-01-01	4505.800
1987-01-01	4541.970
1988-01-01	4608.070
1989-01-01	4817.850
1990-01-01	4993.260
1991-01-01	5108.930
1992-01-01	5118.270
1993-01-01	5143.090
1994-01-01	5346.440
1995-01-01	5614.380
1996-01-01	5872.490
1997-01-01	7188.790
1998-01-01	7412.230
1999-01-01	7679.940
2000-01-01	7875.840
2001-01-01	8593.410
2002-01-01	8860.170
2003-01-01	8907.390
2004-01-01	8978.580
2005-01-01	10562.000
2006-01-01	12818.800
2007-01-01	16586.100
2008-01-01	20426.400
2009-01-01	20826.900
2010-01-01	22847.300
2011-01-01	24893.000
2012-01-01	27091.600
2013-01-01	28955.500
2014-01-01	32195.100
2015-01-01	36503.800
2016-01-01	36416.600