Quarter	Billions of US Dollars
1993-07-01	1.78128
1993-10-01	1.56384
1994-01-01	1.77192
1994-04-01	0.86248
1994-07-01	0.00729
1994-10-01	0.00634
1995-10-01	0.01100
1997-04-01	0.02500
1997-10-01	0.20975
1998-01-01	0.09603
1998-04-01	0.15000
1998-07-01	0.40772
1998-10-01	0.07513
1999-01-01	0.04205
1999-04-01	0.23979
1999-07-01	0.16284
1999-10-01	0.18654
2000-01-01	0.09247
2000-04-01	0.22168
2000-07-01	0.05379
2000-10-01	0.13750
2001-01-01	0.30571
2001-04-01	0.21033
2001-07-01	0.19147
2001-10-01	0.19046
2002-01-01	0.18761
2002-04-01	0.36895
2002-07-01	0.38024
2002-10-01	0.59939
2003-01-01	0.39557
2003-04-01	0.46208
2003-07-01	0.17281
2003-10-01	0.31461
2004-01-01	0.37610
2004-04-01	0.66175
2004-07-01	0.30574
2004-10-01	0.71354
2005-01-01	0.76379
2005-04-01	0.69601
2005-07-01	0.28859
2005-10-01	0.62697
2006-01-01	0.35800
2006-04-01	0.48042
2006-07-01	2.13813
2006-10-01	0.64258
2007-01-01	0.39678
2007-04-01	0.38909
2007-07-01	0.55084
2007-10-01	0.99315
2008-01-01	0.65307
2008-04-01	0.48517
2008-07-01	0.79778
2008-10-01	0.41761
2009-01-01	0.41312
2009-04-01	0.73935
2009-07-01	1.15025
2009-10-01	0.57350
2010-01-01	0.62491
2010-04-01	0.23030
2010-07-01	0.68385
2010-10-01	0.33106
2011-01-01	0.34971
2011-04-01	0.34107
2011-07-01	0.29055
2011-10-01	0.24607
2012-01-01	0.28925
2012-04-01	0.42214
2012-07-01	0.41277
2012-10-01	0.31026
2013-01-01	0.51820
2013-04-01	0.89728
2013-07-01	0.55832
2013-10-01	0.56365
2014-01-01	2.00360
2014-04-01	2.53972
2014-07-01	2.04041
2014-10-01	0.45337
2015-01-01	1.35193
2015-04-01	2.53770