Quarter	Billions of US Dollars
1993-07-01	0.6971
1993-10-01	0.6646
1994-01-01	0.5808
1994-04-01	0.5329
1994-07-01	0.4997
1994-10-01	0.6300
1995-01-01	1.0350
1995-04-01	2.5124
1995-07-01	2.9955
1995-10-01	3.2623
1996-01-01	2.5095
1996-04-01	2.6083
1996-07-01	2.5445
1996-10-01	5.7986
1997-01-01	5.6274
1997-04-01	5.5938
1997-07-01	5.2041
1997-10-01	4.3511
1998-01-01	4.3366
1998-04-01	6.2379
1998-07-01	7.2515
1998-10-01	8.1145
1999-01-01	8.3062
1999-04-01	7.6158
1999-07-01	7.6016
1999-10-01	7.3471
2000-01-01	7.1257
2000-04-01	6.1596
2000-07-01	6.8364
2000-10-01	6.6062
2001-01-01	7.5940
2001-04-01	7.1124
2001-07-01	5.6931
2001-10-01	6.7266
2002-01-01	4.5043
2002-04-01	4.7146
2002-07-01	3.6672
2002-10-01	2.6270
2003-01-01	2.9006
2003-04-01	3.1474
2003-07-01	3.8780
2003-10-01	3.7987
2004-01-01	3.6325
2004-04-01	3.3021
2004-07-01	3.1460
2004-10-01	4.2930
2005-01-01	5.9810
2005-04-01	6.0198
2005-07-01	6.2641
2005-10-01	6.8476
2006-01-01	7.2012
2006-04-01	7.1665
2006-07-01	7.5716
2006-10-01	9.6648
2007-01-01	9.8580
2007-04-01	11.8956
2007-07-01	15.5243
2007-10-01	14.5814
2008-01-01	17.1675
2008-04-01	18.9061
2008-07-01	18.2600
2008-10-01	14.4608
2009-01-01	14.8734
2009-04-01	17.8802
2009-07-01	19.0663
2009-10-01	19.4242
2010-01-01	18.2944
2010-04-01	17.7917
2010-07-01	18.2792
2010-10-01	15.7745
2011-01-01	18.9787
2011-04-01	21.7382
2011-07-01	21.4142
2011-10-01	26.6941
2012-01-01	24.0434
2012-04-01	21.3340
2012-07-01	24.6581
2012-10-01	18.0211
2013-01-01	22.0526
2013-04-01	23.9844
2013-07-01	25.7039
2013-10-01	26.8191
2014-01-01	27.1241
2014-04-01	24.2936
2014-07-01	24.8483
2014-10-01	31.0015
2015-01-01	33.1114
2015-04-01	33.5623