Quarter	Billions of US Dollars
1993-07-01	151.961
1993-10-01	145.925
1994-01-01	148.860
1994-04-01	153.173
1994-07-01	158.408
1994-10-01	155.835
1995-01-01	178.356
1995-04-01	175.375
1995-07-01	177.181
1995-10-01	177.270
1996-01-01	171.952
1996-04-01	164.399
1996-07-01	162.403
1996-10-01	149.655
1997-01-01	139.038
1997-04-01	138.016
1997-07-01	140.030
1997-10-01	136.039
1998-01-01	130.939
1998-04-01	135.207
1998-07-01	151.274
1998-10-01	150.498
1999-01-01	140.593
1999-04-01	138.246
1999-07-01	142.140
1999-10-01	131.207
2000-01-01	124.142
2000-04-01	127.849
2000-07-01	121.897
2000-10-01	126.852
2001-01-01	119.495
2001-04-01	113.817
2001-07-01	124.981
2001-10-01	118.686
2002-01-01	121.684
2002-04-01	144.346
2002-07-01	143.849
2002-10-01	153.539
2003-01-01	158.759
2003-04-01	161.879
2003-07-01	170.777
2003-10-01	188.500
2004-01-01	187.025
2004-04-01	191.129
2004-07-01	194.731
2004-10-01	217.616
2005-01-01	210.418
2005-04-01	197.578
2005-07-01	197.066
2005-10-01	201.479
2006-01-01	211.034
2006-04-01	232.354
2006-07-01	231.264
2006-10-01	246.313
2007-01-01	256.369
2007-04-01	266.128
2007-07-01	276.548
2007-10-01	292.042
2008-01-01	333.025
2008-04-01	330.020
2008-07-01	309.340
2008-10-01	323.628
2009-01-01	315.228
2009-04-01	341.810
2009-07-01	356.689
2009-10-01	358.226
2010-01-01	348.589
2010-04-01	341.210
2010-07-01	383.646
2010-10-01	393.780
2011-01-01	407.431
2011-04-01	443.260
2011-07-01	404.730
2011-10-01	379.698
2012-01-01	392.282
2012-04-01	361.803
2012-07-01	376.143
2012-10-01	379.848
2013-01-01	353.167
2013-04-01	353.767
2013-07-01	358.563
2013-10-01	352.807
2014-01-01	351.548
2014-04-01	345.892
2014-07-01	319.276
2014-10-01	300.901
2015-01-01	291.014
2015-04-01	294.840