Year	Millions of 2011 U.S. Dollars
1960-01-01	68117
1961-01-01	72123
1962-01-01	76100
1963-01-01	76450
1964-01-01	83281
1965-01-01	87277
1966-01-01	89334
1967-01-01	94377
1968-01-01	99726
1969-01-01	106187
1970-01-01	107777
1971-01-01	111012
1972-01-01	115647
1973-01-01	119994
1974-01-01	119015
1975-01-01	117561
1976-01-01	124725
1977-01-01	127193
1978-01-01	130086
1979-01-01	135225
1980-01-01	134731
1981-01-01	133536
1982-01-01	138496
1983-01-01	142169
1984-01-01	148091
1985-01-01	154051
1986-01-01	161675
1987-01-01	162143
1988-01-01	161912
1989-01-01	162840
1990-01-01	165457
1991-01-01	167609
1992-01-01	170920
1993-01-01	170767
1994-01-01	180202
1995-01-01	185726
1996-01-01	190990
1997-01-01	197099
1998-01-01	201357
1999-01-01	206513
2000-01-01	213800
2001-01-01	215307
2002-01-01	216310
2003-01-01	217140
2004-01-01	222127
2005-01-01	227558
2006-01-01	235283
2007-01-01	239008
2008-01-01	237135
2009-01-01	223301
2010-01-01	226194
2011-01-01	227935