Quarter	Billions of US Dollars
1993-07-01	77.020
1993-10-01	73.210
1994-01-01	83.491
1994-04-01	77.478
1994-07-01	80.454
1994-10-01	75.927
1995-01-01	86.217
1995-04-01	84.385
1995-07-01	87.440
1995-10-01	90.795
1996-01-01	98.572
1996-04-01	115.037
1996-07-01	104.862
1996-10-01	105.702
1997-01-01	111.511
1997-04-01	112.983
1997-07-01	123.119
1997-10-01	124.999
1998-01-01	132.141
1998-04-01	119.387
1998-07-01	142.476
1998-10-01	134.492
1999-01-01	166.520
1999-04-01	166.981
1999-07-01	192.630
1999-10-01	167.439
2000-01-01	221.547
2000-04-01	241.365
2000-07-01	241.636
2000-10-01	249.426
2001-01-01	271.397
2001-04-01	259.240
2001-07-01	239.341
2001-10-01	238.058
2002-01-01	242.133
2002-04-01	261.014
2002-07-01	294.112
2002-10-01	286.318
2003-01-01	349.916
2003-04-01	340.963
2003-07-01	319.401
2003-10-01	368.582
2004-01-01	426.337
2004-04-01	403.073
2004-07-01	438.637
2004-10-01	465.531
2005-01-01	504.364
2005-04-01	499.803
2005-07-01	496.933
2005-10-01	461.823
2006-01-01	535.396
2006-04-01	551.881
2006-07-01	573.759
2006-10-01	604.484
2007-01-01	718.886
2007-04-01	761.643
2007-07-01	732.394
2007-10-01	762.386
2008-01-01	886.580
2008-04-01	895.843
2008-07-01	820.125
2008-10-01	648.403
2009-01-01	637.549
2009-04-01	625.858
2009-07-01	683.295
2009-10-01	550.922
2010-01-01	634.824
2010-04-01	537.343
2010-07-01	604.364
2010-10-01	535.752
2011-01-01	586.498
2011-04-01	542.597
2011-07-01	554.995
2011-10-01	545.740
2012-01-01	688.534
2012-04-01	559.573
2012-07-01	468.275
2012-10-01	423.422
2013-01-01	511.647
2013-04-01	454.651
2013-07-01	443.703
2013-10-01	420.303
2014-01-01	454.961
2014-04-01	477.694
2014-07-01	454.854
2014-10-01	435.172
2015-01-01	446.037
2015-04-01	402.839