Quarter	Billions of US Dollars
1989-07-01	0.10705
1989-10-01	0.15963
1990-01-01	0.15620
1990-04-01	0.15889
1990-07-01	0.17141
1990-10-01	0.17851
1991-01-01	0.15904
1991-04-01	0.15389
1991-07-01	0.16542
1991-10-01	0.17985
1992-01-01	0.16680
1992-04-01	0.17878
1992-07-01	0.19225
1992-10-01	0.17201
1993-01-01	0.17546
1993-04-01	0.17468
1993-07-01	0.18053
1993-10-01	0.16950
1994-01-01	0.17778
1994-04-01	0.18594
1994-07-01	5.30793
1994-10-01	5.30710
1995-01-01	5.32950
1995-04-01	5.33327
1995-07-01	5.31981
1995-10-01	5.31568
1996-01-01	5.30980
1996-04-01	5.30406
1996-07-01	5.17188
1996-10-01	5.16954
1997-01-01	5.16618
1997-04-01	5.17026
1997-07-01	5.19942
1997-10-01	5.19648
1998-01-01	5.19623
1998-04-01	5.19389
1998-07-01	5.19615
1998-10-01	5.20420
1999-01-01	5.20265
1999-04-01	5.25453
1999-07-01	5.26335
1999-10-01	5.20465
2000-01-01	5.20273
2000-04-01	5.20331
2000-07-01	5.19992
2000-10-01	5.20319
2001-01-01	5.20141
2001-04-01	5.20025
2001-07-01	5.18800
2001-10-01	5.40735
2002-01-01	5.04639
2002-04-01	5.06058
2002-07-01	4.98033
2002-10-01	4.18043
2003-01-01	4.17455
2003-04-01	4.23980
2003-07-01	4.27082
2003-10-01	4.38212
2004-01-01	4.32661
2004-04-01	4.32952
2004-07-01	3.66964
2004-10-01	4.07987
2005-01-01	3.16255
2005-04-01	3.02981
2005-07-01	2.20696
2005-10-01	2.16447
2006-01-01	2.23237
2006-04-01	2.73034
2006-07-01	2.67148
2006-10-01	2.98766
2007-01-01	2.68277
2007-04-01	2.71334
2007-07-01	2.82131
2007-10-01	2.90832
2008-01-01	2.76634
2008-04-01	2.75113
2008-07-01	3.02196
2008-10-01	2.95796
2009-01-01	2.85342
2009-04-01	2.95492
2009-07-01	2.99135
2009-10-01	2.92507
2010-01-01	2.77170
2010-04-01	2.57076
2010-07-01	2.43859
2010-10-01	2.39795
2011-01-01	2.51757
2011-04-01	2.55238
2011-07-01	2.41966
2011-10-01	2.21162
2012-01-01	2.26623
2012-04-01	2.16696
2012-07-01	3.43992
2012-10-01	3.64961
2013-01-01	2.51662
2013-04-01	2.13136
2013-07-01	2.17891
2013-10-01	3.45214
2014-01-01	3.45206
2014-04-01	3.42638
2014-07-01	4.93951
2014-10-01	4.78539
2015-01-01	7.12695
2015-04-01	7.41131