Quarter	Billions of US Dollars
1993-07-01	0.71811
1993-10-01	0.43016
1994-01-01	0.77653
1994-04-01	0.82737
1994-07-01	0.85755
1994-10-01	1.09429
1995-01-01	0.77970
1995-04-01	1.03225
1995-07-01	1.02884
1995-10-01	1.48246
1996-01-01	1.54414
1996-04-01	1.67656
1996-07-01	1.32419
1996-10-01	1.21668
1997-01-01	1.21080
1997-04-01	1.44038
1997-07-01	2.02503
1997-10-01	1.90957
1998-01-01	2.13124
1998-04-01	2.01638
1998-07-01	1.81252
1998-10-01	2.04036
1999-01-01	1.63615
1999-04-01	1.52232
1999-07-01	1.31841
1999-10-01	1.43935
2000-01-01	1.82975
2000-04-01	1.86795
2000-07-01	2.57338
2000-10-01	2.37419
2001-01-01	2.92942
2001-04-01	3.46786
2001-07-01	3.66198
2001-10-01	4.09706
2002-01-01	3.47700
2002-04-01	3.56631
2002-07-01	3.20514
2002-10-01	3.45432
2003-01-01	2.94828
2003-04-01	3.35592
2003-07-01	3.60629
2003-10-01	3.91927
2004-01-01	4.74405
2004-04-01	4.51607
2004-07-01	4.20378
2004-10-01	3.16762
2005-01-01	3.01005
2005-04-01	2.82437
2005-07-01	3.14882
2005-10-01	3.23242
2006-01-01	4.39505
2006-04-01	4.72030
2006-07-01	5.59168
2006-10-01	6.05093
2007-01-01	6.14044
2007-04-01	5.47637
2007-07-01	4.52249
2007-10-01	4.40685
2008-01-01	3.71275
2008-04-01	3.61975
2008-07-01	3.04038
2008-10-01	2.00892
2009-01-01	1.85256
2009-04-01	2.32130
2009-07-01	2.62660
2009-10-01	3.06037
2010-01-01	2.88469
2010-04-01	3.04412
2010-07-01	3.19379
2010-10-01	5.05623
2011-01-01	5.67468
2011-04-01	6.21995
2011-07-01	6.42328
2011-10-01	6.24584
2012-01-01	6.59102
2012-04-01	7.32445
2012-07-01	7.37281
2012-10-01	5.25966
2013-01-01	5.52673
2013-04-01	6.77538
2013-07-01	8.62043
2013-10-01	9.17102
2014-01-01	9.58837
2014-04-01	8.12080
2014-07-01	6.62709
2014-10-01	9.18765
2015-01-01	8.27789
2015-04-01	8.77881