Quarter	Billions of US Dollars
1974-10-01	0.00960
1975-10-01	0.01890
1978-04-01	0.01310
1979-10-01	0.02150
1981-01-01	0.01560
1982-04-01	0.01650
1983-01-01	0.06310
1984-04-01	0.03100
1985-10-01	0.04640
1987-01-01	0.06710
1987-10-01	0.04410
1988-01-01	0.07160
1988-04-01	0.07230
1988-07-01	0.05680
1989-01-01	0.08660
1989-07-01	0.02940
1991-04-01	0.03390
1993-01-01	0.06560
1993-07-01	0.22570
1994-01-01	0.06780
1995-04-01	0.08640
1995-07-01	0.08640
1996-01-01	0.16245
1999-04-01	0.09967
1999-10-01	0.09676
2000-10-01	0.13845
2001-04-01	0.13914
2002-01-01	0.17183
2002-04-01	0.02591
2002-07-01	0.00279
2002-10-01	0.03514
2003-01-01	0.01668
2003-04-01	0.16078
2003-07-01	0.00267
2003-10-01	0.00348
2004-01-01	0.17110
2004-04-01	0.00053
2004-07-01	0.00168
2004-10-01	0.13116
2005-01-01	0.00267
2005-04-01	0.21045
2005-07-01	0.00313
2005-10-01	0.00129
2006-01-01	0.40546
2006-04-01	0.20481
2006-07-01	0.00123
2006-10-01	0.00319
2007-01-01	0.00210
2007-04-01	0.20730
2007-07-01	0.00313
2007-10-01	0.00120
2008-01-01	0.00092
2008-04-01	0.33859
2009-01-01	0.26610
2009-07-01	0.23604
2009-10-01	0.29686
2010-04-01	0.41931
2011-04-01	0.22730
2012-04-01	0.25895
2013-01-01	0.32841
2013-10-01	0.22109
2015-01-01	0.20791