Quarter	Billions of US Dollars
1999-07-01	0.10017
1999-10-01	0.09377
2000-01-01	0.08988
2000-04-01	0.09223
2000-07-01	0.08641
2000-10-01	0.09166
2001-01-01	0.08662
2001-04-01	0.16709
2001-07-01	0.18614
2001-10-01	0.17886
2002-01-01	0.17826
2002-04-01	0.20336
2002-07-01	0.20227
2002-10-01	0.21633
2003-01-01	0.22161
2003-04-01	0.22090
2003-07-01	0.22805
2003-10-01	0.24254
2004-01-01	0.23513
2004-04-01	0.23927
2004-07-01	0.23819
2004-10-01	0.26511
2005-01-01	0.25100
2005-04-01	0.23348
2005-07-01	0.23252
2005-10-01	0.22826
2006-01-01	0.22976
2006-04-01	0.24333
2006-07-01	0.23929
2006-10-01	0.24584
2007-01-01	0.24566
2007-04-01	0.24458
2007-07-01	0.12821
2007-10-01	0.13327
2008-01-01	0.15092
2008-04-01	0.14739
2008-07-01	0.13615
2008-10-01	0.14102
2009-01-01	0.13176
2009-04-01	0.13885
2009-07-01	0.14577
2009-10-01	0.14556
2010-01-01	0.14148
2010-04-01	0.13873
2010-07-01	0.15416
2010-10-01	0.15964
2011-01-01	0.16397