Year	Millions of 2000 Dollars
1961-01-01	20.39850000000000
1962-01-01	23.37810000000000
1963-01-01	24.42010000000000
1964-01-01	25.57230000000000
1965-01-01	23.43190000000000
1966-01-01	22.75960000000000
1967-01-01	21.94990000000000
1968-01-01	22.92140000000000
1969-01-01	23.76880000000000
1970-01-01	24.71420000000000
1971-01-01	31.92330000000000
1972-01-01	34.72250000000000
1973-01-01	43.62650000000000
1974-01-01	46.20120000000000
1975-01-01	36.61030000000000
1976-01-01	40.10280000000000
1977-01-01	47.76800000000000
1978-01-01	50.49050000000000
1979-01-01	49.03000000000000
1980-01-01	55.96840000000000
1981-01-01	71.23810000000000
1982-01-01	82.26660000000000
1983-01-01	53.45790000000000
1984-01-01	42.69780000000000
1985-01-01	46.90060000000000
1986-01-01	58.42790000000000
1987-01-01	77.80020000000000
1988-01-01	75.23810000000000
1989-01-01	79.66170000000000
1990-01-01	87.64930000000000
1991-01-01	82.53470000000000
1992-01-01	76.19300000000000
1993-01-01	71.39500000000000
1994-01-01	84.03410000000000
1995-01-01	97.01790000000000
1996-01-01	103.60700000000001
1997-01-01	103.22900000000000
1998-01-01	95.67640000000000
1999-01-01	107.53600000000000
2000-01-01	109.30700000000000
2001-01-01	107.45100000000001
2002-01-01	127.71200000000000
2003-01-01	165.41700000000000
2004-01-01	180.32800000000000
2005-01-01	195.02800000000000
2006-01-01	222.68500000000000
2007-01-01	198.26300000000000
2008-01-01	191.33100000000000
2009-01-01	229.21700000000000
2010-01-01	268.60100000000000
2011-01-01	233.33599999999998
2012-01-01	237.84200000000000
2013-01-01	243.95900000000000
2014-01-01	251.52599999999998
2015-01-01	245.93700000000000
2016-01-01	263.78600000000000