Quarter	Billions of US Dollars
1989-07-01	0.30000
1989-10-01	0.17700
1990-01-01	0.16200
1990-04-01	0.16600
1990-07-01	0.29100
1990-10-01	0.63300
1991-01-01	0.41900
1991-04-01	0.58500
1991-07-01	0.35600
1991-10-01	0.54800
1992-01-01	0.26400
1992-04-01	0.29100
1992-07-01	0.24300
1992-10-01	0.20800
1993-01-01	0.22600
1993-04-01	0.27500
1993-07-01	0.28222
1993-10-01	0.37227
1994-01-01	0.39960
1994-04-01	0.47638
1994-07-01	0.65420
1994-10-01	0.69001
1995-01-01	0.68327
1995-04-01	0.56005
1995-07-01	0.61737
1995-10-01	0.65876
1996-01-01	0.73046
1996-04-01	0.53174
1996-07-01	0.68655
1996-10-01	0.99147
1997-01-01	1.13247
1997-04-01	1.31754
1997-07-01	1.22425
1997-10-01	0.74373
1998-01-01	0.81758
1998-04-01	0.44915
1998-07-01	0.47302
1998-10-01	0.46739
1999-01-01	0.44384
1999-04-01	0.33174
1999-07-01	0.49424
1999-10-01	0.30997
2000-01-01	0.40866
2000-04-01	0.43518
2000-07-01	0.33544
2000-10-01	0.34012
2001-01-01	0.36407
2001-04-01	0.23343
2001-07-01	0.19956
2001-10-01	0.26368
2002-01-01	0.24778
2002-04-01	0.20206
2002-07-01	0.39810
2002-10-01	0.58657
2003-01-01	0.56630
2003-04-01	0.61003
2003-07-01	0.37176
2003-10-01	0.57005
2004-01-01	0.71943
2004-04-01	0.79457
2004-07-01	0.74791
2004-10-01	0.78937
2005-01-01	1.23636
2005-04-01	1.16398
2005-07-01	1.82975
2005-10-01	1.40590
2006-01-01	2.49966
2006-04-01	2.66959
2006-07-01	4.87577
2006-10-01	5.39660
2007-01-01	5.70847
2007-04-01	5.45879
2007-07-01	4.63568
2007-10-01	4.95282
2008-01-01	3.03866
2008-04-01	4.04465
2008-07-01	4.32404
2008-10-01	2.40715
2009-01-01	2.83433
2009-04-01	2.56136
2009-07-01	2.95493
2009-10-01	2.38449
2010-01-01	2.86071
2010-04-01	2.78705
2010-07-01	2.45392
2010-10-01	2.15761
2011-01-01	2.25098
2011-04-01	2.22847
2011-07-01	2.03164
2011-10-01	2.07965
2012-01-01	2.16258
2012-04-01	2.06187
2012-07-01	1.99223
2012-10-01	2.01631
2013-01-01	1.80676
2013-04-01	1.99910
2013-07-01	2.66827
2013-10-01	2.03794
2014-01-01	2.12567
2014-04-01	1.93815
2014-07-01	2.17889
2014-10-01	2.18154
2015-01-01	2.45357
2015-04-01	2.21577