Quarter	Billions of US Dollars
1987-01-01	0.15900
1987-04-01	0.19400
1987-07-01	0.23100
1987-10-01	0.20800
1988-01-01	0.26800
1988-04-01	0.28500
1988-07-01	0.21500
1988-10-01	0.17300
1989-01-01	0.25400
1989-04-01	0.23900
1989-07-01	0.24800
1989-10-01	0.22700
1990-01-01	0.23000
1990-04-01	0.27400
1990-07-01	0.25000
1990-10-01	0.26300
1991-01-01	0.30800
1991-04-01	0.29900
1991-07-01	0.26300
1991-10-01	0.25000
1992-01-01	0.28500
1992-04-01	0.28800
1992-07-01	0.27500
1992-10-01	0.26000
1993-01-01	0.28400
1993-04-01	0.23400
1993-07-01	0.43564
1993-10-01	0.51438
1994-01-01	0.45658
1994-04-01	0.29531
1994-07-01	0.34842
1994-10-01	0.27114
1995-01-01	0.29585
1995-04-01	0.36300
1995-07-01	0.30122
1995-10-01	0.29598
1996-01-01	0.39980
1996-04-01	0.28896
1996-07-01	0.34299
1996-10-01	0.29958
1997-01-01	0.28870
1997-04-01	0.29500
1997-07-01	0.31382
1997-10-01	0.19289
1998-01-01	0.16119
1998-04-01	0.14655
1998-07-01	0.21379
1998-10-01	0.27256
1999-01-01	0.34474
1999-04-01	0.55285
1999-07-01	0.79792
1999-10-01	0.74135
2000-01-01	0.62753
2000-04-01	0.86511
2000-07-01	1.05900
2000-10-01	0.92698
2001-01-01	1.21758
2001-04-01	1.08276
2001-07-01	1.01279
2001-10-01	1.20155
2002-01-01	0.63179
2002-04-01	1.00368
2002-07-01	1.16794
2002-10-01	1.85311
2003-01-01	2.17883
2003-04-01	2.16347
2003-07-01	1.74300
2003-10-01	2.13745
2004-01-01	2.40410
2004-04-01	2.66019
2004-07-01	2.36041
2004-10-01	2.37525
2005-01-01	2.70191
2005-04-01	2.67483
2005-07-01	2.49097
2005-10-01	3.39003
2006-01-01	2.92179
2006-04-01	2.34631
2006-07-01	2.44934
2006-10-01	2.91777
2007-01-01	3.53076
2007-04-01	3.37495
2007-07-01	2.98064
2007-10-01	3.34363
2008-01-01	3.67136
2008-04-01	2.30242
2008-07-01	1.84135
2008-10-01	0.75541
2009-01-01	0.44788
2009-04-01	0.57885
2009-07-01	2.03964
2009-10-01	1.80633
2010-01-01	2.33961
2010-04-01	2.77773
2010-07-01	0.26733
2010-10-01	0.06362
2011-01-01	0.10679