Quarter	Billions of US Dollars
1987-01-01	1.33800
1987-04-01	1.54100
1987-07-01	1.95800
1987-10-01	1.94000
1988-01-01	1.87000
1988-04-01	1.41600
1988-07-01	1.39400
1988-10-01	1.46200
1989-01-01	1.91100
1989-04-01	2.18200
1989-07-01	1.71500
1989-10-01	1.18900
1990-01-01	1.28800
1990-04-01	1.14300
1990-07-01	1.76100
1990-10-01	2.20700
1991-01-01	2.39600
1991-04-01	2.37000
1991-07-01	2.23400
1991-10-01	1.87200
1992-01-01	1.82500
1992-04-01	1.65700
1992-07-01	1.35700
1992-10-01	0.99400
1993-01-01	0.79500
1993-04-01	0.92800
1993-07-01	0.59158
1993-10-01	0.74088
1994-01-01	1.00324
1994-04-01	0.56986
1994-07-01	1.00406
1994-10-01	0.88763
1995-01-01	0.75272
1995-04-01	0.89460
1995-07-01	0.83251
1995-10-01	0.88012
1996-01-01	0.66939
1996-04-01	1.24839
1996-07-01	0.79291
1996-10-01	1.40913
1997-01-01	1.55710
1997-04-01	1.63410
1997-07-01	1.21417
1997-10-01	1.86728
1998-01-01	1.36952
1998-04-01	1.09091
1998-07-01	1.03763
1998-10-01	1.58477
1999-01-01	1.05734
1999-04-01	1.06716
1999-07-01	1.49586
1999-10-01	1.41627
2000-01-01	1.55477
2000-04-01	1.47901
2000-07-01	1.23503
2000-10-01	1.85282
2001-01-01	2.10852
2001-04-01	2.54604
2001-07-01	2.18697
2001-10-01	1.88240
2002-01-01	1.66302
2002-04-01	1.94255
2002-07-01	2.59294
2002-10-01	1.56880
2003-01-01	2.54096
2003-04-01	1.88753
2003-07-01	1.34592
2003-10-01	1.17631
2004-01-01	1.63256
2004-04-01	1.99094
2004-07-01	2.36875
2004-10-01	3.58041
2005-01-01	2.36864
2005-04-01	2.03794
2005-07-01	1.99387
2005-10-01	1.18852
2006-01-01	0.75757
2006-04-01	0.53727
2006-07-01	0.50135
2006-10-01	0.36300
2007-01-01	0.63257
2007-04-01	0.54736
2007-07-01	0.26300
2007-10-01	1.27805
2008-01-01	1.51680
2008-04-01	1.09437
2008-07-01	0.49748
2008-10-01	0.11263
2009-01-01	0.20781
2009-04-01	0.22284
2009-07-01	0.07322
2009-10-01	0.23355
2010-01-01	0.17144
2010-04-01	0.14608
2010-07-01	0.17320
2010-10-01	0.43338
2011-01-01	1.26533
2011-04-01	0.60267
2011-07-01	0.83835
2011-10-01	0.64126
2012-01-01	0.88930
2012-04-01	0.83958
2012-07-01	0.60995
2012-10-01	1.48068
2013-01-01	2.30670
2013-04-01	0.62654
2013-07-01	0.64666
2013-10-01	0.98208
2014-01-01	0.91755
2014-04-01	0.85655
2014-07-01	0.78502
2014-10-01	0.55974
2015-01-01	0.61915
2015-04-01	0.80873