Quarter	Billions of US Dollars
1993-07-01	2.5084
1993-10-01	3.2641
1994-01-01	4.4570
1994-04-01	3.9920
1994-07-01	3.4667
1994-10-01	3.2422
1995-01-01	3.3370
1995-04-01	3.3992
1995-07-01	3.4667
1995-10-01	3.4123
1996-01-01	3.3878
1996-04-01	3.5003
1996-07-01	3.5224
1996-10-01	3.3771
1997-01-01	3.2253
1997-04-01	3.5767
1997-07-01	3.7487
1997-10-01	3.4502
1998-01-01	3.4207
1998-04-01	3.8500
1998-07-01	3.6930
1998-10-01	3.6885
1999-01-01	3.0306
1999-04-01	3.0052
1999-07-01	2.8522
1999-10-01	2.9050
2000-01-01	3.5874
2000-04-01	3.5079
2000-07-01	3.2964
2000-10-01	3.3047
2001-01-01	3.1656
2001-04-01	3.3191
2001-07-01	3.2276
2001-10-01	3.1868
2002-01-01	3.4008
2002-04-01	3.3806
2002-07-01	2.8605
2002-10-01	2.9572
2003-01-01	3.3371
2003-04-01	3.0415
2003-07-01	3.0846
2003-10-01	4.5534
2004-01-01	6.5164
2004-04-01	8.2989
2004-07-01	11.1455
2004-10-01	13.5990
2005-01-01	16.9567
2005-04-01	18.5214
2005-07-01	21.9329
2005-10-01	23.8148
2006-01-01	25.1234
2006-04-01	26.4879
2006-07-01	26.2266
2006-10-01	27.2769
2007-01-01	29.6211
2007-04-01	33.0071
2007-07-01	35.8143
2007-10-01	36.0694
2008-01-01	32.7558
2008-04-01	35.6812
2008-07-01	32.4704
2008-10-01	25.0117
2009-01-01	23.4901
2009-04-01	26.6196
2009-07-01	28.8761
2009-10-01	28.4779
2010-01-01	27.6565
2010-04-01	28.2099
2010-07-01	29.2441
2010-10-01	31.7309
2011-01-01	35.3057
2011-04-01	36.4043
2011-07-01	33.6038
2011-10-01	35.6700
2012-01-01	38.9014
2012-04-01	38.2112
2012-07-01	39.4614
2012-10-01	38.5772
2013-01-01	38.0793
2013-04-01	36.5486
2013-07-01	38.8078
2013-10-01	37.5808
2014-01-01	34.2023
2014-04-01	34.4061
2014-07-01	27.1654
2014-10-01	26.3013
2015-01-01	19.3182
2015-04-01	19.9574