Year	Millions of 2011 U.S. Dollars
1960-01-01	525384
1961-01-01	550628
1962-01-01	588468
1963-01-01	624954
1964-01-01	665117
1965-01-01	697099
1966-01-01	733425
1967-01-01	769336
1968-01-01	803574
1969-01-01	860740
1970-01-01	914109
1971-01-01	962842
1972-01-01	1006536
1973-01-01	1073074
1974-01-01	1123417
1975-01-01	1110794
1976-01-01	1159515
1977-01-01	1200942
1978-01-01	1247724
1979-01-01	1290762
1980-01-01	1311889
1981-01-01	1324734
1982-01-01	1356758
1983-01-01	1373472
1984-01-01	1394000
1985-01-01	1416447
1986-01-01	1448402
1987-01-01	1482996
1988-01-01	1552218
1989-01-01	1617221
1990-01-01	1659596
1991-01-01	1676845
1992-01-01	1701628
1993-01-01	1690272
1994-01-01	1728259
1995-01-01	1763642
1996-01-01	1782471
1997-01-01	1821397
1998-01-01	1882929
1999-01-01	1944914
2000-01-01	2016489
2001-01-01	2053505
2002-01-01	2072579
2003-01-01	2091222
2004-01-01	2144437
2005-01-01	2183605
2006-01-01	2237471
2007-01-01	2288602
2008-01-01	2286756
2009-01-01	2214790
2010-01-01	2251623
2011-01-01	2289849