Quarter	Billions of US Dollars
1987-01-01	0.32400
1987-04-01	0.19900
1987-07-01	0.33000
1987-10-01	0.33000
1988-01-01	0.33000
1988-04-01	0.25000
1988-07-01	0.25100
1988-10-01	0.22300
1989-01-01	0.18800
1989-04-01	0.18800
1989-07-01	0.18800
1989-10-01	0.05300
1990-01-01	0.05500
1990-04-01	0.18300
1990-07-01	0.48900
1990-10-01	0.91200
1991-01-01	0.02400
1991-04-01	0.13400
1991-07-01	0.42000
1991-10-01	0.86500
1992-01-01	0.33900
1992-04-01	0.39100
1992-07-01	1.39200
1992-10-01	1.63700
1993-01-01	1.72600
1993-04-01	2.60100
1993-07-01	6.61509
1993-10-01	6.23526
1994-01-01	7.11997
1994-04-01	6.89085
1994-07-01	7.12703
1994-10-01	5.21877
1995-01-01	1.78637
1995-04-01	1.83651
1995-07-01	2.87617
1995-10-01	2.32770
1996-01-01	2.77929
1996-04-01	3.54137
1996-07-01	2.32218
1996-10-01	2.11030
1997-01-01	1.68500
1997-04-01	1.53103
1997-07-01	1.81998
1997-10-01	1.28989
1998-01-01	1.31657
1998-04-01	1.06679
1998-07-01	0.99507
1998-10-01	0.75268
1999-01-01	1.08520
1999-04-01	1.10638
1999-07-01	1.17394
1999-10-01	1.25377
2000-01-01	1.06181
2000-04-01	0.86826
2000-07-01	0.99902
2000-10-01	2.47299
2001-01-01	2.79213
2001-04-01	3.27742
2001-07-01	0.80710
2001-10-01	0.74118
2002-01-01	0.66731
2002-04-01	0.64393
2002-07-01	0.66227
2002-10-01	0.50164
2003-01-01	0.40756
2003-04-01	0.38656
2003-07-01	0.33238
2003-10-01	0.37841
2004-01-01	0.32080
2004-04-01	0.43686
2004-07-01	0.47245
2004-10-01	0.70464
2005-01-01	0.56267
2005-04-01	0.75581
2005-07-01	0.64788
2005-10-01	0.65391
2006-01-01	0.81752
2006-04-01	1.00446
2006-07-01	1.06466
2006-10-01	0.88967
2007-01-01	0.92459
2007-04-01	0.83750
2007-07-01	0.89716
2007-10-01	0.69175
2008-01-01	0.61559
2008-04-01	0.62243
2008-07-01	0.57725
2008-10-01	0.77983
2009-01-01	0.72399
2009-04-01	0.66907
2009-07-01	0.74762
2009-10-01	0.70990
2010-01-01	0.81635
2010-04-01	0.74560
2010-07-01	0.92487
2010-10-01	0.82725
2011-01-01	0.78881
2011-04-01	0.82669
2011-07-01	1.05761
2011-10-01	0.99652
2012-01-01	1.00387
2012-04-01	1.08449
2012-07-01	0.98635
2012-10-01	1.02673
2013-01-01	1.07944
2013-04-01	1.11886
2013-07-01	1.10055
2013-10-01	1.06695
2014-01-01	1.76420
2014-04-01	1.66271
2014-07-01	1.52944
2014-10-01	1.44205
2015-01-01	1.13704
2015-04-01	2.09526