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	0.77052
1993-10-01	0.98260
1994-01-01	1.24464
1994-04-01	1.09416
1994-07-01	1.87062
1994-10-01	1.68173
1995-01-01	1.99818
1995-04-01	2.10188
1995-07-01	1.86482
1995-10-01	1.78466
1996-01-01	1.71592
1996-04-01	1.82099
1996-07-01	1.34578
1996-10-01	1.90315
1997-01-01	1.99973
1997-04-01	2.15503
1997-07-01	1.66123
1997-10-01	2.24268
1998-01-01	1.78818
1998-04-01	1.25065
1998-07-01	1.09745
1998-10-01	1.66987
1999-01-01	1.26189
1999-04-01	1.07662
1999-07-01	1.46950
1999-10-01	1.41443
2000-01-01	1.72201
2000-04-01	1.78461
2000-07-01	1.59063
2000-10-01	2.31313
2001-01-01	2.14890
2001-04-01	2.59887
2001-07-01	2.21738
2001-10-01	1.95396
2002-01-01	1.72290
2002-04-01	1.95027
2002-07-01	2.35406
2002-10-01	1.78194
2003-01-01	3.69112
2003-04-01	3.17783
2003-07-01	2.41249
2003-10-01	2.49518
2004-01-01	3.85335
2004-04-01	4.45819
2004-07-01	4.74948
2004-10-01	7.59485
2005-01-01	7.07227
2005-04-01	5.72561
2005-07-01	5.58498
2005-10-01	3.98853
2006-01-01	3.81116
2006-04-01	3.69284
2006-07-01	3.38612
2006-10-01	3.39009
2007-01-01	2.51670
2007-04-01	2.94372
2007-07-01	3.47147
2007-10-01	5.46135
2008-01-01	7.94052
2008-04-01	4.54998
2008-07-01	2.30407
2008-10-01	1.14557
2009-01-01	1.00427
2009-04-01	0.68950
2009-07-01	0.13885
2009-10-01	0.33881
2010-01-01	0.32985
2010-04-01	0.46079
2010-07-01	0.29000
2010-10-01	0.62334
2011-01-01	1.44402
2011-04-01	0.88953
2011-07-01	1.21993
2011-10-01	1.15230
2012-01-01	0.99915
2012-04-01	0.98498
2012-07-01	1.02345
2012-10-01	1.84418
2013-01-01	2.40976
2013-04-01	0.62654
2013-07-01	0.64666
2013-10-01	1.96660
2014-01-01	1.90576
2014-04-01	1.58266
2014-07-01	1.15128
2014-10-01	0.92013
2015-01-01	0.61915
2015-04-01	0.83180