Year	2011 U.S. Dollars
1960-01-01	23919
1961-01-01	25052
1962-01-01	25773
1963-01-01	27010
1964-01-01	28688
1965-01-01	29708
1966-01-01	31647
1967-01-01	33139
1968-01-01	35082
1969-01-01	37352
1970-01-01	39932
1971-01-01	41518
1972-01-01	43772
1973-01-01	45279
1974-01-01	46460
1975-01-01	46636
1976-01-01	48608
1977-01-01	50428
1978-01-01	50105
1979-01-01	52614
1980-01-01	53068
1981-01-01	53202
1982-01-01	54988
1983-01-01	56991
1984-01-01	57077
1985-01-01	58308
1986-01-01	59483
1987-01-01	60319
1988-01-01	61516
1989-01-01	63141
1990-01-01	64644
1991-01-01	66042
1992-01-01	67041
1993-01-01	67708
1994-01-01	69314
1995-01-01	71294
1996-01-01	72670
1997-01-01	73781
1998-01-01	75789
1999-01-01	77109
2000-01-01	78934
2001-01-01	79085
2002-01-01	80505
2003-01-01	80685
2004-01-01	82267
2005-01-01	83259
2006-01-01	84880
2007-01-01	86467
2008-01-01	85978
2009-01-01	83369
2010-01-01	84558
2011-01-01	85816