Quarter	Billions of US Dollars
1972-10-01	0.00980
1976-07-01	0.10000
1977-04-01	0.03010
1978-07-01	0.03000
1980-07-01	0.05320
1982-10-01	0.10000
1983-01-01	0.15000
1983-04-01	0.15000
1983-10-01	0.02000
1984-07-01	0.04000
1984-10-01	0.01500
1986-04-01	0.05220
1986-07-01	0.22830
1987-01-01	0.09770
1987-04-01	0.29720
1987-07-01	0.04470
1988-07-01	0.12060
1988-10-01	0.12460
1989-04-01	0.02980
1990-07-01	0.12760
1991-10-01	0.09440
1992-01-01	0.03100
1993-04-01	0.02990
1993-07-01	0.03000
1993-10-01	0.36636
1994-01-01	0.11245
1994-04-01	0.09417
1994-07-01	0.38181
1994-10-01	0.12585
1995-07-01	0.35827
1995-10-01	0.00700
1996-01-01	0.03560
1996-07-01	0.01600
1996-10-01	0.03481
1997-01-01	0.03000
1997-04-01	0.05917
1997-07-01	0.01616
1998-04-01	0.22540
1998-07-01	0.00012
1998-10-01	0.04720
1999-01-01	0.03609
1999-04-01	0.16967
1999-07-01	0.09488
1999-10-01	0.49300
2000-01-01	0.36509
2000-04-01	0.18162
2000-07-01	0.10388
2000-10-01	0.07508
2001-01-01	0.06058
2001-04-01	0.43475
2001-07-01	0.00349
2001-10-01	0.14513
2002-01-01	0.05093
2002-04-01	0.40000
2002-07-01	0.00027
2002-10-01	0.00173
2003-01-01	0.12753
2003-04-01	0.03285
2003-07-01	0.42411
2003-10-01	0.15619
2004-01-01	0.67787
2004-04-01	0.63454
2004-07-01	0.29643
2004-10-01	0.30672
2005-01-01	0.62084
2005-04-01	0.25527
2005-07-01	0.71946
2005-10-01	0.95594
2006-01-01	0.34395
2006-04-01	0.04232
2006-07-01	0.24733
2006-10-01	0.23639
2007-01-01	0.66275
2007-04-01	0.55069
2007-07-01	0.96767
2007-10-01	0.37176
2008-01-01	0.86920
2008-04-01	0.17093
2008-07-01	0.32634
2008-10-01	0.07074
2009-01-01	0.07823
2009-04-01	1.62658
2009-07-01	0.06399
2009-10-01	0.77216
2010-01-01	0.11763
2010-04-01	0.06253
2010-07-01	0.08267
2010-10-01	0.15588
2011-01-01	0.12206
2011-04-01	0.49950
2011-07-01	0.29681
2011-10-01	0.15721
2012-01-01	0.64890
2012-04-01	0.25079
2012-07-01	1.53795
2012-10-01	1.58224
2013-01-01	0.34265
2013-04-01	0.66134
2013-07-01	0.12855
2013-10-01	0.16191
2014-01-01	0.50664
2014-04-01	0.09534
2014-07-01	1.92724
2014-10-01	0.28480
2015-01-01	1.03210
2015-04-01	0.52684