Quarter	Billions of US Dollars
1993-07-01	86.970
1993-10-01	83.045
1994-01-01	95.817
1994-04-01	89.182
1994-07-01	93.348
1994-10-01	88.931
1995-01-01	92.721
1995-04-01	95.287
1995-07-01	98.057
1995-10-01	103.392
1996-01-01	112.835
1996-04-01	131.809
1996-07-01	119.548
1996-10-01	121.875
1997-01-01	125.540
1997-04-01	126.441
1997-07-01	137.040
1997-10-01	133.977
1998-01-01	143.961
1998-04-01	131.054
1998-07-01	152.142
1998-10-01	141.718
1999-01-01	177.048
1999-04-01	177.487
1999-07-01	201.216
1999-10-01	177.412
2000-01-01	230.552
2000-04-01	250.976
2000-07-01	250.178
2000-10-01	259.952
2001-01-01	280.233
2001-04-01	267.780
2001-07-01	244.156
2001-10-01	245.379
2002-01-01	248.115
2002-04-01	269.168
2002-07-01	303.357
2002-10-01	297.405
2003-01-01	363.835
2003-04-01	352.241
2003-07-01	330.546
2003-10-01	381.820
2004-01-01	439.289
2004-04-01	414.514
2004-07-01	453.041
2004-10-01	484.791
2005-01-01	528.515
2005-04-01	524.165
2005-07-01	521.077
2005-10-01	485.514
2006-01-01	567.219
2006-04-01	582.923
2006-07-01	605.909
2006-10-01	637.818
2007-01-01	770.747
2007-04-01	815.110
2007-07-01	780.729
2007-10-01	811.573
2008-01-01	935.527
2008-04-01	940.611
2008-07-01	866.500
2008-10-01	684.941
2009-01-01	656.919
2009-04-01	644.424
2009-07-01	705.809
2009-10-01	575.864
2010-01-01	661.655
2010-04-01	565.542
2010-07-01	627.372
2010-10-01	562.278
2011-01-01	621.288
2011-04-01	579.895
2011-07-01	605.523
2011-10-01	597.912
2012-01-01	749.159
2012-04-01	613.302
2012-07-01	516.842
2012-10-01	490.683
2013-01-01	578.669
2013-04-01	529.357
2013-07-01	518.339
2013-10-01	503.735
2014-01-01	554.136
2014-04-01	573.546
2014-07-01	550.766
2014-10-01	528.446
2015-01-01	548.107
2015-04-01	492.769