Year	2011 U.S. Dollars
1960-01-01	26064
1961-01-01	26476
1962-01-01	26716
1963-01-01	27894
1964-01-01	29141
1965-01-01	29597
1966-01-01	30197
1967-01-01	31412
1968-01-01	32994
1969-01-01	33771
1970-01-01	34726
1971-01-01	35561
1972-01-01	36826
1973-01-01	38957
1974-01-01	38422
1975-01-01	38372
1976-01-01	39591
1977-01-01	40510
1978-01-01	41619
1979-01-01	42368
1980-01-01	41700
1981-01-01	42281
1982-01-01	44095
1983-01-01	46125
1984-01-01	46485
1985-01-01	47681
1986-01-01	49422
1987-01-01	50956
1988-01-01	52079
1989-01-01	52074
1990-01-01	52781
1991-01-01	53248
1992-01-01	55012
1993-01-01	57244
1994-01-01	59392
1995-01-01	60535
1996-01-01	61840
1997-01-01	63099
1998-01-01	64661
1999-01-01	65793
2000-01-01	67791
2001-01-01	69178
2002-01-01	70328
2003-01-01	72332
2004-01-01	73657
2005-01-01	74937
2006-01-01	76210
2007-01-01	78430
2008-01-01	77112
2009-01-01	75275
2010-01-01	76431
2011-01-01	76638