Quarter	Billions of US Dollars
1990-07-01	0.1598
1990-10-01	0.4016
1991-01-01	0.3494
1991-04-01	0.3311
1991-07-01	0.3608
1991-10-01	0.3958
1992-01-01	0.3653
1992-04-01	0.4093
1992-07-01	0.4435
1992-10-01	0.3872
1993-01-01	0.3872
1993-04-01	0.6702
1993-07-01	1.0187
1993-10-01	0.9750
1994-01-01	1.0131
1994-04-01	1.2951
1994-07-01	1.3092
1994-10-01	1.3045
1995-01-01	1.4709
1995-04-01	1.4739
1995-07-01	1.2287
1995-10-01	0.9656
1996-01-01	0.9525
1996-04-01	0.6423
1996-07-01	0.6855
1996-10-01	0.7182
1997-01-01	0.6871
1997-04-01	0.9515
1997-07-01	0.9324
1997-10-01	0.9080
1998-01-01	0.8436
1998-04-01	0.8287
1998-07-01	0.8453
1998-10-01	1.0894
1999-01-01	1.0703
1999-04-01	1.0221
1999-07-01	1.0699
1999-10-01	1.0679
2000-01-01	1.0425
2000-04-01	1.0440
2000-07-01	0.6903
2000-10-01	0.7051
2001-01-01	0.6921
2001-04-01	0.6825
2001-07-01	0.7224
2001-10-01	1.5604
2002-01-01	1.5492
2002-04-01	1.8916
2002-07-01	1.8762
2002-10-01	1.9605
2003-01-01	2.2006
2003-04-01	2.2812
2003-07-01	2.3153
2003-10-01	2.6134
2004-01-01	2.5519
2004-04-01	4.5774
2004-07-01	4.7826
2004-10-01	5.6240
2005-01-01	6.6829
2005-04-01	6.2805
2005-07-01	5.8660
2005-10-01	5.5609
2006-01-01	5.6926
2006-04-01	5.9539
2006-07-01	6.2033
2006-10-01	5.7746
2007-01-01	6.1144
2007-04-01	6.4061
2007-07-01	6.7775
2007-10-01	7.8924
2008-01-01	8.6171
2008-04-01	11.8055
2008-07-01	11.9453
2008-10-01	11.5565
2009-01-01	11.2503
2009-04-01	14.4303
2009-07-01	15.1273
2009-10-01	17.5037
2010-01-01	16.6700
2010-04-01	17.7815
2010-07-01	22.8550
2010-10-01	23.1217
2011-01-01	24.6000
2011-04-01	26.4208
2011-07-01	24.8622
2011-10-01	23.8020
2012-01-01	27.2991
2012-04-01	27.4107
2012-07-01	28.6589
2012-10-01	33.0785
2013-01-01	31.9083
2013-04-01	34.1518
2013-07-01	35.4763
2013-10-01	36.6145
2014-01-01	37.7577
2014-04-01	34.4241
2014-07-01	32.0905
2014-10-01	29.9240
2015-01-01	27.3267
2015-04-01	27.5395