Year	Millions of 2000 Dollars
1960-01-01	222837
1961-01-01	259635
1962-01-01	306659
1963-01-01	346939
1964-01-01	376145
1965-01-01	408961
1966-01-01	436848
1967-01-01	466995
1968-01-01	496832
1969-01-01	422933
1970-01-01	463677
1971-01-01	576833
1972-01-01	664055
1973-01-01	754275
1974-01-01	830795
1975-01-01	897282
1976-01-01	856189
1977-01-01	965869
1978-01-01	1300000
1979-01-01	1400000
1980-01-01	1200000
1981-01-01	944765
1982-01-01	863145
1983-01-01	743719
1984-01-01	676413
1985-01-01	882638
1986-01-01	1100000
1987-01-01	1300000
1988-01-01	1200000
1989-01-01	1200000
1990-01-01	1300000
1991-01-01	1300000
1992-01-01	1200000
1993-01-01	1100000
1994-01-01	1300000
1995-01-01	1500000
1996-01-01	1400000
1997-01-01	1300000
1998-01-01	1300000
1999-01-01	1200000
2000-01-01	1100000
2001-01-01	1100000
2002-01-01	1300000
2003-01-01	1700000
2004-01-01	1900000
2005-01-01	1700000
2006-01-01	2100000
2007-01-01	2400000
2008-01-01	2500000
2009-01-01	2600000
2010-01-01	2400000
2011-01-01	2300000
2012-01-01	2400000
2013-01-01	2500000
2014-01-01	2200000
2015-01-01	2100000
2016-01-01	2100000