Year	Millions of 2011 U.S. Dollars
1960-01-01	59380
1961-01-01	62997
1962-01-01	64692
1963-01-01	67143
1964-01-01	70508
1965-01-01	74233
1966-01-01	77043
1967-01-01	81866
1968-01-01	83713
1969-01-01	87485
1970-01-01	89232
1971-01-01	94243
1972-01-01	99204
1973-01-01	103647
1974-01-01	107604
1975-01-01	113012
1976-01-01	119558
1977-01-01	124508
1978-01-01	129306
1979-01-01	134941
1980-01-01	141019
1981-01-01	143201
1982-01-01	143380
1983-01-01	148925
1984-01-01	157702
1985-01-01	166146
1986-01-01	172854
1987-01-01	175931
1988-01-01	175627
1989-01-01	177379
1990-01-01	180796
1991-01-01	186411
1992-01-01	192979
1993-01-01	198356
1994-01-01	208376
1995-01-01	217099
1996-01-01	228171
1997-01-01	240475
1998-01-01	246927
1999-01-01	251929
2000-01-01	260125
2001-01-01	265302
2002-01-01	269287
2003-01-01	271935
2004-01-01	282707
2005-01-01	290026
2006-01-01	297137
2007-01-01	305020
2008-01-01	305127
2009-01-01	300040
2010-01-01	302070
2011-01-01	306441