Year	US Dollars, Monthly Level
1970-01-01	157930000000.0000
1971-01-01	175770000000.0000
1972-01-01	211090000000.0000
1973-01-01	288430000000.0000
1974-01-01	418440000000.0000
1975-01-01	415210000000.0000
1976-01-01	482090000000.0000
1977-01-01	552630000000.0000
1978-01-01	643340000000.0000
1979-01-01	826890000000.0000
1980-01-01	990080000000.0000
1981-01-01	955690000000.0000
1982-01-01	893980000000.0000
1983-01-01	892040000000.0000
1984-01-01	993300000000.0000
1985-01-01	1033890000000.0001
1986-01-01	1132840000000.0000
1987-01-01	1324340000000.0000
1988-01-01	1503620000000.0000
1989-01-01	1607020000000.0000
1990-01-01	1829670000000.0000
1991-01-01	1853340000000.0000
1992-01-01	1934420000000.0000
1993-01-01	1862450000000.0000
1994-01-01	2112440000000.0000
1995-01-01	2456110000000.0000
1996-01-01	2566760000000.0000
1997-01-01	2655740000000.0000
1998-01-01	2698170000000.0000
1999-01-01	2869510000000.0000
2000-01-01	3244830000000.0000
2001-01-01	3086730000000.0000
2002-01-01	3125430000000.0000
2003-01-01	3563580000000.0000
2004-01-01	4181430000000.0005
2005-01-01	4653260000000.0000
2006-01-01	5237960000000.0000
2007-01-01	5785000000000.0000
2008-01-01	6365890000000.0000
2009-01-01	4814290000000.0000
2010-01-01	5696320000000.0000
2011-01-01	6676770000000.0000
2012-01-01	6578740000000.0000
2013-01-01	6551080000000.0000
2014-01-01	6665330000000.0000
2015-01-01	5953650000000.0000
2016-01-01	5800810000000.0000