Year	Millions of 2000 Dollars
1960-01-01	214901
1961-01-01	219622
1962-01-01	211815
1963-01-01	226199
1964-01-01	235694
1965-01-01	249860
1966-01-01	249045
1967-01-01	230878
1968-01-01	234144
1969-01-01	228897
1970-01-01	236580
1971-01-01	276569
1972-01-01	314690
1973-01-01	365288
1974-01-01	371219
1975-01-01	320453
1976-01-01	286842
1977-01-01	329529
1978-01-01	369652
1979-01-01	401206
1980-01-01	453004
1981-01-01	416481
1982-01-01	385763
1983-01-01	368206
1984-01-01	314898
1985-01-01	421532
1986-01-01	521647
1987-01-01	1200000
1988-01-01	1300000
1989-01-01	1300000
1990-01-01	1700000
1991-01-01	1600000
1992-01-01	886355
1993-01-01	884750
1994-01-01	978580
1995-01-01	1100000
1996-01-01	1400000
1997-01-01	1700000
1998-01-01	2000000
1999-01-01	2000000
2000-01-01	1900000
2001-01-01	2000000
2002-01-01	2300000
2003-01-01	2800000
2004-01-01	3200000
2005-01-01	3100000
2006-01-01	4000000
2007-01-01	4500000
2008-01-01	3800000
2009-01-01	4200000
2010-01-01	4100000
2011-01-01	3800000
2012-01-01	3800000
2013-01-01	4000000
2014-01-01	3700000
2015-01-01	3500000
2016-01-01	3100000