Year	US Dollars, Monthly Level
1970-01-01	163110000000.00000
1971-01-01	182400000000.00000
1972-01-01	213680000000.00000
1973-01-01	289300000000.00000
1974-01-01	390600000000.00000
1975-01-01	417900000000.00000
1976-01-01	461560000000.00000
1977-01-01	527419999999.99994
1978-01-01	633500000000.00000
1979-01-01	770930000000.00000
1980-01-01	911320000000.00000
1981-01-01	913610000000.00000
1982-01-01	862870000000.00000
1983-01-01	849080000000.00000
1984-01-01	910120000000.00000
1985-01-01	943880000000.00000
1986-01-01	1098170000000.00010
1987-01-01	1268430000000.00000
1988-01-01	1459940000000.00000
1989-01-01	1566930000000.00000
1990-01-01	1791540000000.00000
1991-01-01	1839570000000.00000
1992-01-01	1952090000000.00000
1993-01-01	1915030000000.00000
1994-01-01	2148320000000.00020
1995-01-01	2504880000000.00000
1996-01-01	2583250000000.00000
1997-01-01	2664630000000.00000
1998-01-01	2658980000000.00000
1999-01-01	2715800000000.00000
2000-01-01	2941460000000.00000
2001-01-01	2807660000000.00000
2002-01-01	2844060000000.00000
2003-01-01	3219670000000.00000
2004-01-01	3741500000000.00000
2005-01-01	4039270000000.00000
2006-01-01	4535700000000.00000
2007-01-01	5116170000000.00000
2008-01-01	5582590000000.00000
2009-01-01	4313210000000.00000
2010-01-01	5054120000000.00000
2011-01-01	5813180000000.00000
2012-01-01	5746210000000.00000
2013-01-01	5770800000000.00000
2014-01-01	5873180000000.00000
2015-01-01	5248270000000.00000
2016-01-01	5168300000000.00000