Quarter	Billions of US Dollars
1986-04-01	0.100
1986-07-01	0.100
1986-10-01	0.100
1987-01-01	0.100
1987-04-01	0.100
1987-07-01	0.100
1987-10-01	0.100
1988-01-01	0.173
1988-04-01	0.166
1988-07-01	0.429
1988-10-01	0.447
1989-01-01	0.875
1989-04-01	0.853
1989-07-01	1.348
1989-10-01	1.470
1990-01-01	1.770
1990-04-01	1.796
1990-07-01	1.912
1990-10-01	1.991
1991-01-01	1.750
1991-04-01	1.662
1991-07-01	1.925
1991-10-01	2.087
1992-01-01	1.943
1992-04-01	2.073
1992-07-01	2.246
1992-10-01	1.989
1993-01-01	1.982
1993-04-01	1.813
1993-07-01	1.831
1993-10-01	1.726
1994-01-01	1.684
1994-04-01	1.763
1994-07-01	1.767
1994-10-01	1.764
1995-01-01	1.617
1995-04-01	1.615
1995-07-01	1.125
1995-10-01	1.115
1996-01-01	1.082
1996-04-01	1.048
1996-07-01	0.080
1996-10-01	1.099
1997-01-01	2.286
1997-04-01	5.075
1997-07-01	5.212
1997-10-01	5.830
1998-01-01	6.740
1998-04-01	11.720
1998-07-01	18.377
1998-10-01	18.282
1999-01-01	18.037
1999-04-01	17.830
1999-07-01	17.917
1999-10-01	17.538
2000-01-01	17.411
2000-04-01	17.131
2000-07-01	37.446
2000-10-01	37.585
2001-01-01	37.313
2001-04-01	36.777
2001-07-01	36.910
2001-10-01	36.656
2002-01-01	37.156
2002-04-01	38.306
2002-07-01	38.274
2002-10-01	40.104
2003-01-01	42.259
2003-04-01	41.190
2003-07-01	41.244
2003-10-01	42.535
2004-01-01	41.767
2004-04-01	42.950
2004-07-01	43.736
2004-10-01	44.182
2005-01-01	44.860
2005-04-01	44.743
2005-07-01	42.422
2005-10-01	42.438
2006-01-01	42.431
2006-04-01	43.413
2006-07-01	44.581
2006-10-01	50.337
2007-01-01	54.321
2007-04-01	56.449
2007-07-01	56.967
2007-10-01	56.669
2008-01-01	56.686
2008-04-01	59.296
2008-07-01	62.261
2008-10-01	61.638
2009-01-01	59.619
2009-04-01	61.832
2009-07-01	60.643
2009-10-01	59.625
2010-01-01	56.109
2010-04-01	61.931
2010-07-01	63.162
2010-10-01	65.016
2011-01-01	69.829
2011-04-01	72.781
2011-07-01	70.086
2011-10-01	68.776
2012-01-01	68.599
2012-04-01	83.624
2012-07-01	95.678
2012-10-01	107.670
2013-01-01	112.044
2013-04-01	119.008
2013-07-01	123.707
2013-10-01	127.987
2014-01-01	115.849
2014-04-01	116.380
2014-07-01	115.339
2014-10-01	113.398
2015-01-01	111.465
2015-04-01	110.093