Year	Millions of 2011 U.S. Dollars
1960-01-01	163562
1961-01-01	168306
1962-01-01	175543
1963-01-01	181336
1964-01-01	196931
1965-01-01	207368
1966-01-01	213174
1967-01-01	224473
1968-01-01	239512
1969-01-01	255799
1970-01-01	271506
1971-01-01	283227
1972-01-01	293237
1973-01-01	309201
1974-01-01	319832
1975-01-01	319840
1976-01-01	334092
1977-01-01	342513
1978-01-01	351748
1979-01-01	358833
1980-01-01	363649
1981-01-01	360799
1982-01-01	356322
1983-01-01	363698
1984-01-01	374833
1985-01-01	384504
1986-01-01	395220
1987-01-01	402852
1988-01-01	416716
1989-01-01	435136
1990-01-01	453338
1991-01-01	464395
1992-01-01	472318
1993-01-01	478258
1994-01-01	492420
1995-01-01	507763
1996-01-01	525060
1997-01-01	547525
1998-01-01	569007
1999-01-01	595661
2000-01-01	619136
2001-01-01	631060
2002-01-01	631542
2003-01-01	633661
2004-01-01	647833
2005-01-01	661091
2006-01-01	683529
2007-01-01	710328
2008-01-01	723143
2009-01-01	696621
2010-01-01	707970
2011-01-01	714997