Quarter	Billions of US Dollars
1987-01-01	0.0686
1987-04-01	0.0680
1987-07-01	0.0683
1987-10-01	0.0810
1988-01-01	0.0797
1988-04-01	0.0755
1988-07-01	0.0743
1988-10-01	0.0795
1989-01-01	0.0757
1989-04-01	0.0694
1989-07-01	0.0718
1989-10-01	0.0697
1990-01-01	0.0636
1990-04-01	0.0654
1990-07-01	0.0726
1990-10-01	0.0744
1991-01-01	0.0709
1993-04-01	0.1200
1993-07-01	0.1200
1993-10-01	0.1700
1994-01-01	0.3700
1994-04-01	0.3700
1994-07-01	0.3700
1994-10-01	0.4700
1995-01-01	0.4700
1995-04-01	0.5200
1995-07-01	0.5700
1995-10-01	0.5698
1996-01-01	0.5678
1996-04-01	0.6953
1996-07-01	1.1398
1996-10-01	1.1392
1997-01-01	1.0270
1997-04-01	1.0687
1997-07-01	1.5023
1997-10-01	1.4778
1998-01-01	1.6546
1998-04-01	2.0735
1998-07-01	3.1759
1998-10-01	3.0906
1999-01-01	2.7344
1999-04-01	2.7204
1999-07-01	2.7369
1999-10-01	2.7631
2000-01-01	2.6921
2000-04-01	2.6488
2000-07-01	1.2283
2000-10-01	1.1884
2001-01-01	1.1376
2001-04-01	1.1842
2001-07-01	1.8005
2001-10-01	1.7813
2002-01-01	1.3133
2002-04-01	1.3257
2002-07-01	1.3262
2002-10-01	1.5254
2003-01-01	1.7309
2003-04-01	2.0594
2003-07-01	2.6481
2003-10-01	2.6981
2004-01-01	2.0913
2004-04-01	1.7428
2004-07-01	1.3413
2004-10-01	1.4072
2005-01-01	1.3621
2005-04-01	1.1053
2005-07-01	1.0309
2005-10-01	0.7138
2006-01-01	0.9462
2006-04-01	0.9761
2006-07-01	0.9815
2006-10-01	1.7728
2007-01-01	2.2926
2007-04-01	2.3268
2007-07-01	2.3386
2007-10-01	2.6541
2008-01-01	4.4066
2008-04-01	4.9913
2008-07-01	5.0125
2008-10-01	4.8153
2009-01-01	4.7250
2009-04-01	4.3323
2009-07-01	5.1249
2009-10-01	7.9035
2010-01-01	8.7854
2010-04-01	11.1615
2010-07-01	12.8008
2010-10-01	13.0193
2011-01-01	15.4807
2011-04-01	16.5784
2011-07-01	16.4627
2011-10-01	16.2638
2012-01-01	17.2184
2012-04-01	17.8191
2012-07-01	17.9147
2012-10-01	18.0695
2013-01-01	16.9809
2013-04-01	18.9031
2013-07-01	18.8243
2013-10-01	18.8231
2014-01-01	19.0530
2014-04-01	19.2991
2014-07-01	19.4023
2014-10-01	17.6733
2015-01-01	17.5177
2015-04-01	17.1379