Quarter	Billions of US Dollars
1993-07-01	0.882
1993-10-01	1.399
1994-01-01	2.040
1994-04-01	2.289
1994-07-01	2.824
1994-10-01	3.066
1995-01-01	3.103
1995-04-01	3.109
1995-07-01	3.230
1995-10-01	4.161
1996-01-01	3.282
1996-04-01	3.446
1996-07-01	3.655
1996-10-01	3.902
1997-01-01	3.559
1997-04-01	4.030
1997-07-01	4.027
1997-10-01	4.432
1998-01-01	4.476
1998-04-01	4.787
1998-07-01	4.654
1998-10-01	4.878
1999-01-01	5.335
1999-04-01	5.638
1999-07-01	5.963
1999-10-01	6.215
2000-01-01	6.739
2000-04-01	6.938
2000-07-01	7.805
2000-10-01	8.634
2001-01-01	8.846
2001-04-01	9.997
2001-07-01	11.044
2001-10-01	11.683
2002-01-01	13.653
2002-04-01	15.624
2002-07-01	16.573
2002-10-01	18.281
2003-01-01	20.833
2003-04-01	22.659
2003-07-01	26.084
2003-10-01	29.783
2004-01-01	30.913
2004-04-01	32.776
2004-07-01	34.357
2004-10-01	42.078
2005-01-01	44.789
2005-04-01	48.771
2005-07-01	52.714
2005-10-01	59.631
2006-01-01	70.358
2006-04-01	77.854
2006-07-01	83.978
2006-10-01	96.872
2007-01-01	108.655
2007-04-01	124.934
2007-07-01	132.265
2007-10-01	143.759
2008-01-01	157.292
2008-04-01	171.746
2008-07-01	154.709
2008-10-01	138.251
2009-01-01	140.120
2009-04-01	154.532
2009-07-01	171.128
2009-10-01	172.357
2010-01-01	175.537
2010-04-01	166.242
2010-07-01	182.576
2010-10-01	187.538
2011-01-01	202.451
2011-04-01	213.053
2011-07-01	200.641
2011-10-01	209.840
2012-01-01	220.972
2012-04-01	206.677
2012-07-01	215.071
2012-10-01	219.435
2013-01-01	216.187
2013-04-01	202.039
2013-07-01	208.950
2013-10-01	205.336
2014-01-01	209.432
2014-04-01	204.157
2014-07-01	196.303
2014-10-01	184.118
2015-01-01	163.957
2015-04-01	169.028