Quarter	Billions of US Dollars
1989-10-01	5.305
1990-01-01	5.281
1990-04-01	5.215
1990-07-01	5.227
1990-10-01	6.431
1991-01-01	6.136
1991-04-01	5.795
1991-07-01	5.725
1991-10-01	8.352
1992-01-01	8.265
1992-04-01	8.215
1992-07-01	8.232
1992-10-01	9.937
1993-01-01	9.582
1993-04-01	9.402
1993-07-01	8.555
1993-10-01	10.795
1994-01-01	11.111
1994-04-01	11.520
1994-07-01	11.875
1994-10-01	12.186
1995-01-01	12.982
1995-04-01	13.752
1995-07-01	13.820
1995-10-01	13.009
1996-01-01	13.184
1996-04-01	13.239
1996-07-01	12.999
1996-10-01	12.374
1997-01-01	12.770
1997-04-01	13.055
1997-07-01	13.692
1997-10-01	13.199
1998-01-01	13.804
1998-04-01	13.797
1998-07-01	14.388
1998-10-01	14.945
1999-01-01	15.463
1999-04-01	14.338
1999-07-01	14.672
1999-10-01	15.093
2000-01-01	15.523
2000-04-01	15.955
2000-07-01	14.420
2000-10-01	14.802
2001-01-01	14.366
2001-04-01	13.906
2001-07-01	14.501
2001-10-01	15.943
2002-01-01	16.795
2002-04-01	17.469
2002-07-01	18.371
2002-10-01	19.228
2003-01-01	20.140
2003-04-01	20.789
2003-07-01	21.073
2003-10-01	21.649
2004-01-01	21.474
2004-04-01	21.954
2004-07-01	21.323
2004-10-01	20.981
2005-01-01	20.543
2005-04-01	19.568
2005-07-01	19.418
2005-10-01	19.317
2006-01-01	18.985
2006-04-01	19.019
2006-07-01	18.963
2006-10-01	19.360
2007-01-01	19.739
2007-04-01	20.329
2007-07-01	20.805
2007-10-01	21.261
2008-01-01	21.144
2008-04-01	19.492
2008-07-01	17.460
2008-10-01	17.425
2009-01-01	18.799
2009-04-01	19.914
2009-07-01	20.319
2009-10-01	20.770
2010-01-01	21.494
2010-04-01	21.323
2010-07-01	21.913
2010-10-01	23.924
2011-01-01	25.601
2011-04-01	27.339
2011-07-01	27.496
2011-10-01	32.448
2012-01-01	36.114
2012-04-01	36.915
2012-07-01	39.864
2012-10-01	40.431
2013-01-01	40.829
2013-04-01	43.596
2013-07-01	40.977
2013-10-01	41.189
2014-01-01	54.793
2014-04-01	63.788
2014-07-01	64.345
2014-10-01	71.771
2015-01-01	74.395