Quarter	Billions of US Dollars
1993-07-01	6.3979
1993-10-01	6.8710
1994-01-01	7.6383
1994-04-01	8.7808
1994-07-01	9.8556
1994-10-01	10.1377
1995-01-01	7.9792
1995-04-01	7.8049
1995-07-01	9.1906
1995-10-01	10.0772
1996-01-01	10.9052
1996-04-01	15.2893
1996-07-01	10.8269
1996-10-01	12.8003
1997-01-01	12.4102
1997-04-01	11.5177
1997-07-01	13.3599
1997-10-01	10.8572
1998-01-01	13.5958
1998-04-01	12.8139
1998-07-01	10.2086
1998-10-01	6.8744
1999-01-01	5.4286
1999-04-01	7.8549
1999-07-01	10.0794
1999-10-01	10.7080
2000-01-01	12.5646
2000-04-01	10.9707
2000-07-01	9.3027
2000-10-01	9.2331
2001-01-01	9.5624
2001-04-01	9.4924
2001-07-01	8.3380
2001-10-01	8.7258
2002-01-01	6.7651
2002-04-01	6.4510
2002-07-01	5.5355
2002-10-01	7.6431
2003-01-01	12.3195
2003-04-01	12.9534
2003-07-01	14.4322
2003-10-01	12.5637
2004-01-01	10.7401
2004-04-01	12.1093
2004-07-01	9.8071
2004-10-01	9.9685
2005-01-01	8.6044
2005-04-01	7.4644
2005-07-01	7.8816
2005-10-01	7.4001
2006-01-01	9.2078
2006-04-01	9.4859
2006-07-01	12.2696
2006-10-01	13.2291
2007-01-01	15.0241
2007-04-01	16.2884
2007-07-01	9.6288
2007-10-01	11.6326
2008-01-01	15.4380
2008-04-01	15.6039
2008-07-01	15.3182
2008-10-01	13.3975
2009-01-01	10.2339
2009-04-01	15.1259
2009-07-01	16.2004
2009-10-01	18.6623
2010-01-01	18.4325
2010-04-01	12.1947
2010-07-01	13.5872
2010-10-01	10.6959
2011-01-01	10.3956
2011-04-01	12.9097
2011-07-01	11.1609
2011-10-01	13.9588
2012-01-01	17.6673
2012-04-01	19.0622
2012-07-01	21.5350
2012-10-01	25.5106
2013-01-01	28.6095
2013-04-01	31.7775
2013-07-01	30.6970
2013-10-01	29.3766
2014-01-01	32.7279
2014-04-01	33.2467
2014-07-01	30.2712
2014-10-01	27.3407
2015-01-01	27.3869
2015-04-01	28.3881