Year	US Dollars, Monthly Level
1969-01-01	1458760000000.0000
1970-01-01	1611150000000.0000
1971-01-01	1705310000000.0000
1972-01-01	1872800000000.0000
1973-01-01	2104159999999.9998
1974-01-01	2181389999999.9998
1975-01-01	2044470000000.0000
1976-01-01	2301940000000.0000
1977-01-01	2410340000000.0000
1978-01-01	2553940000000.0000
1979-01-01	2765770000000.0000
1980-01-01	2813350000000.0000
1981-01-01	2867330000000.0000
1982-01-01	2835150000000.0000
1983-01-01	2937760000000.0000
1984-01-01	3301560000000.0000
1985-01-01	3518810000000.0000
1986-01-01	3666860000000.0000
1987-01-01	3892650000000.0000
1988-01-01	4269680000000.0005
1989-01-01	4618760000000.0000
1990-01-01	4874820000000.0000
1991-01-01	5075240000000.0000
1992-01-01	5474160000000.0000
1993-01-01	5722950000000.0000
1994-01-01	6224110000000.0000
1995-01-01	6884300000000.0000
1996-01-01	7525210000000.0000
1997-01-01	8350190000000.0010
1998-01-01	8807100000000.0000
1999-01-01	9378090000000.0000
2000-01-01	10613950000000.0000
2001-01-01	10727210000000.0000
2002-01-01	11203240000000.0000
2003-01-01	11953820000000.0000
2004-01-01	13317750000000.0000
2005-01-01	14415310000000.0000
2006-01-01	15756500000000.0000
2007-01-01	16973759999999.9980
2008-01-01	17453320000000.0000
2009-01-01	15541050000000.0000
2010-01-01	17494259999999.9980
2011-01-01	18618190000000.0000
2012-01-01	19064650000000.0000
2013-01-01	19577330000000.0000