Quarter	Billions of US Dollars
1993-07-01	45.753
1993-10-01	45.339
1994-01-01	49.303
1994-04-01	49.338
1994-07-01	48.010
1994-10-01	47.766
1995-01-01	48.792
1995-04-01	49.077
1995-07-01	49.377
1995-10-01	51.689
1996-01-01	52.004
1996-04-01	53.233
1996-07-01	55.668
1996-10-01	57.324
1997-01-01	57.970
1997-04-01	62.429
1997-07-01	64.280
1997-10-01	65.083
1998-01-01	69.393
1998-04-01	71.961
1998-07-01	81.805
1998-10-01	85.208
1999-01-01	83.292
1999-04-01	86.195
1999-07-01	92.244
1999-10-01	91.712
2000-01-01	90.722
2000-04-01	91.403
2000-07-01	92.113
2000-10-01	97.274
2001-01-01	98.695
2001-04-01	99.479
2001-07-01	106.474
2001-10-01	107.876
2002-01-01	107.172
2002-04-01	120.454
2002-07-01	117.333
2002-10-01	119.030
2003-01-01	125.791
2003-04-01	128.156
2003-07-01	131.562
2003-10-01	141.250
2004-01-01	138.104
2004-04-01	138.210
2004-07-01	136.212
2004-10-01	143.633
2005-01-01	144.163
2005-04-01	138.504
2005-07-01	130.531
2005-10-01	127.072
2006-01-01	132.315
2006-04-01	138.260
2006-07-01	134.902
2006-10-01	141.896
2007-01-01	141.568
2007-04-01	150.870
2007-07-01	159.120
2007-10-01	164.475
2008-01-01	164.581
2008-04-01	174.254
2008-07-01	156.472
2008-10-01	156.800
2009-01-01	148.984
2009-04-01	149.793
2009-07-01	151.351
2009-10-01	151.438
2010-01-01	149.616
2010-04-01	144.876
2010-07-01	156.315
2010-10-01	155.875
2011-01-01	159.843
2011-04-01	157.458
2011-07-01	154.756
2011-10-01	152.182
2012-01-01	156.324
2012-04-01	148.179
2012-07-01	151.908
2012-10-01	147.252
2013-01-01	143.192
2013-04-01	145.598
2013-07-01	150.720
2013-10-01	160.046
2014-01-01	164.697
2014-04-01	165.389
2014-07-01	160.746
2014-10-01	158.186
2015-01-01	150.940
2015-04-01	152.729