Quarter	Billions of US Dollars
1993-07-01	22.833
1993-10-01	21.169
1994-01-01	21.332
1994-04-01	21.395
1994-07-01	25.130
1994-10-01	28.231
1995-01-01	34.052
1995-04-01	37.390
1995-07-01	37.474
1995-10-01	41.335
1996-01-01	42.876
1996-04-01	44.582
1996-07-01	38.775
1996-10-01	46.316
1997-01-01	48.157
1997-04-01	47.724
1997-07-01	50.621
1997-10-01	59.539
1998-01-01	58.644
1998-04-01	61.698
1998-07-01	63.164
1998-10-01	66.515
1999-01-01	69.048
1999-04-01	74.520
1999-07-01	87.753
1999-10-01	83.341
2000-01-01	91.414
2000-04-01	91.604
2000-07-01	86.565
2000-10-01	97.617
2001-01-01	100.457
2001-04-01	94.371
2001-07-01	100.668
2001-10-01	99.168
2002-01-01	99.231
2002-04-01	108.231
2002-07-01	115.282
2002-10-01	128.272
2003-01-01	134.650
2003-04-01	138.701
2003-07-01	136.418
2003-10-01	137.683
2004-01-01	131.567
2004-04-01	132.142
2004-07-01	132.007
2004-10-01	141.087
2005-01-01	152.952
2005-04-01	139.930
2005-07-01	138.666
2005-10-01	134.963
2006-01-01	148.717
2006-04-01	156.044
2006-07-01	160.201
2006-10-01	160.412
2007-01-01	172.244
2007-04-01	183.922
2007-07-01	171.392
2007-10-01	177.019
2008-01-01	167.959
2008-04-01	164.891
2008-07-01	153.215
2008-10-01	146.755
2009-01-01	129.274
2009-04-01	132.314
2009-07-01	129.224
2009-10-01	120.732
2010-01-01	129.336
2010-04-01	125.876
2010-07-01	138.015
2010-10-01	133.467
2011-01-01	129.965
2011-04-01	134.916
2011-07-01	131.198
2011-10-01	135.215
2012-01-01	142.248
2012-04-01	146.987
2012-07-01	163.517
2012-10-01	163.975
2013-01-01	173.068
2013-04-01	188.278
2013-07-01	191.118
2013-10-01	198.534
2014-01-01	202.865
2014-04-01	207.189
2014-07-01	213.604
2014-10-01	208.959
2015-01-01	200.225
2015-04-01	196.390