Quarter	Billions of US Dollars
1993-07-01	39.149
1993-10-01	36.761
1994-01-01	37.369
1994-04-01	34.344
1994-07-01	34.550
1994-10-01	40.716
1995-01-01	47.832
1995-04-01	53.987
1995-07-01	58.509
1995-10-01	58.619
1996-01-01	58.161
1996-04-01	55.050
1996-07-01	58.564
1996-10-01	77.092
1997-01-01	75.699
1997-04-01	79.416
1997-07-01	73.268
1997-10-01	85.558
1998-01-01	87.742
1998-04-01	86.811
1998-07-01	95.076
1998-10-01	71.368
1999-01-01	65.463
1999-04-01	74.524
1999-07-01	69.264
1999-10-01	68.242
2000-01-01	76.862
2000-04-01	112.740
2000-07-01	111.054
2000-10-01	123.137
2001-01-01	113.232
2001-04-01	83.677
2001-07-01	82.351
2001-10-01	77.125
2002-01-01	96.681
2002-04-01	101.844
2002-07-01	106.514
2002-10-01	109.391
2003-01-01	101.548
2003-04-01	97.768
2003-07-01	94.310
2003-10-01	88.808
2004-01-01	89.910
2004-04-01	128.860
2004-07-01	137.373
2004-10-01	139.030
2005-01-01	149.682
2005-04-01	120.381
2005-07-01	119.408
2005-10-01	127.316
2006-01-01	123.981
2006-04-01	115.073
2006-07-01	103.530
2006-10-01	85.265
2007-01-01	111.751
2007-04-01	148.307
2007-07-01	180.278
2007-10-01	160.757
2008-01-01	170.217
2008-04-01	177.008
2008-07-01	148.120
2008-10-01	156.854
2009-01-01	153.821
2009-04-01	154.751
2009-07-01	152.884
2009-10-01	132.405
2010-01-01	139.240
2010-04-01	127.517
2010-07-01	166.407
2010-10-01	148.606
2011-01-01	185.728
2011-04-01	186.591
2011-07-01	193.709
2011-10-01	194.906
2012-01-01	168.791
2012-04-01	168.785
2012-07-01	149.849
2012-10-01	172.756
2013-01-01	178.831
2013-04-01	171.735
2013-07-01	193.264
2013-10-01	197.421
2014-01-01	206.252
2014-04-01	212.626
2014-07-01	194.359
2014-10-01	193.429
2015-01-01	158.640
2015-04-01	154.111