Year	2011 U.S. Dollars
1970-01-01	34500
1971-01-01	35673
1972-01-01	38613
1973-01-01	40220
1974-01-01	40695
1975-01-01	41576
1976-01-01	43325
1977-01-01	44629
1978-01-01	47308
1979-01-01	46902
1980-01-01	48708
1981-01-01	50079
1982-01-01	51031
1983-01-01	51108
1984-01-01	53733
1985-01-01	55021
1986-01-01	55594
1987-01-01	57276
1988-01-01	58971
1989-01-01	62355
1990-01-01	64348
1991-01-01	65617
1992-01-01	67729
1993-01-01	68268
1994-01-01	70112
1995-01-01	73596
1996-01-01	76451
1997-01-01	80313
1998-01-01	79822
1999-01-01	82405
2000-01-01	86202
2001-01-01	87607
2002-01-01	91316
2003-01-01	93381
2004-01-01	94388
2005-01-01	94773
2006-01-01	95633
2007-01-01	97050
2008-01-01	95172
2009-01-01	96352
2010-01-01	100162
2011-01-01	102983