Year	Millions of 2011 U.S. Dollars
1960-01-01	622141
1961-01-01	639328
1962-01-01	648672
1963-01-01	679012
1964-01-01	718939
1965-01-01	737564
1966-01-01	754242
1967-01-01	775481
1968-01-01	810934
1969-01-01	830366
1970-01-01	851620
1971-01-01	871492
1972-01-01	905152
1973-01-01	972557
1974-01-01	961655
1975-01-01	956741
1976-01-01	981315
1977-01-01	1005017
1978-01-01	1037984
1979-01-01	1067464
1980-01-01	1046085
1981-01-01	1032925
1982-01-01	1056129
1983-01-01	1096610
1984-01-01	1128886
1985-01-01	1172560
1986-01-01	1223008
1987-01-01	1286068
1988-01-01	1357692
1989-01-01	1392915
1990-01-01	1418287
1991-01-01	1393067
1992-01-01	1405015
1993-01-01	1448444
1994-01-01	1514732
1995-01-01	1562892
1996-01-01	1611553
1997-01-01	1673763
1998-01-01	1732590
1999-01-01	1787456
2000-01-01	1863163
2001-01-01	1916923
2002-01-01	1963560
2003-01-01	2038467
2004-01-01	2097749
2005-01-01	2155946
2006-01-01	2212010
2007-01-01	2292365
2008-01-01	2270178
2009-01-01	2179951
2010-01-01	2219175
2011-01-01	2236004