Year	Millions of 2011 U.S. Dollars
1964-01-01	339583
1965-01-01	361093
1966-01-01	387524
1967-01-01	404045
1968-01-01	431170
1969-01-01	469218
1970-01-01	488560
1971-01-01	509864
1972-01-01	550488
1973-01-01	592759
1974-01-01	627008
1975-01-01	631788
1976-01-01	652868
1977-01-01	670320
1978-01-01	678714
1979-01-01	679806
1980-01-01	689354
1981-01-01	688429
1982-01-01	697013
1983-01-01	709348
1984-01-01	722006
1985-01-01	738769
1986-01-01	762804
1987-01-01	805129
1988-01-01	846134
1989-01-01	886973
1990-01-01	920538
1991-01-01	943952
1992-01-01	952735
1993-01-01	942914
1994-01-01	965369
1995-01-01	991996
1996-01-01	1015973
1997-01-01	1055278
1998-01-01	1102429
1999-01-01	1154750
2000-01-01	1213063
2001-01-01	1257575
2002-01-01	1291658
2003-01-01	1331563
2004-01-01	1374963
2005-01-01	1424236
2006-01-01	1482291
2007-01-01	1533863
2008-01-01	1547494
2009-01-01	1489606
2010-01-01	1488571
2011-01-01	1499111