Year	Millions of 2000 Dollars
1960-01-01	220262
1961-01-01	259954
1962-01-01	288718
1963-01-01	318133
1964-01-01	354640
1965-01-01	389411
1966-01-01	424394
1967-01-01	463382
1968-01-01	478765
1969-01-01	540600
1970-01-01	567050
1971-01-01	695510
1972-01-01	783794
1973-01-01	935558
1974-01-01	1000000
1975-01-01	960975
1976-01-01	1100000
1977-01-01	1300000
1978-01-01	1500000
1979-01-01	1500000
1980-01-01	1200000
1981-01-01	990017
1982-01-01	964251
1983-01-01	854733
1984-01-01	747571
1985-01-01	986305
1986-01-01	1300000
1987-01-01	1600000
1988-01-01	1400000
1989-01-01	1500000
1990-01-01	1900000
1991-01-01	1900000
1992-01-01	1900000
1993-01-01	1900000
1994-01-01	2200000
1995-01-01	2400000
1996-01-01	2300000
1997-01-01	2000000
1998-01-01	2200000
1999-01-01	2600000
2000-01-01	2400000
2001-01-01	1500000
2002-01-01	1900000
2003-01-01	2300000
2004-01-01	2500000
2005-01-01	2200000
2006-01-01	2500000
2007-01-01	3000000
2008-01-01	3000000
2009-01-01	3000000
2010-01-01	2900000
2011-01-01	2900000
2012-01-01	3100000
2013-01-01	3300000
2014-01-01	3000000
2015-01-01	2900000
2016-01-01	2900000