Quarter	Billions of US Dollars
1991-04-01	0.01400
1993-07-01	0.05618
1993-10-01	0.05426
1994-01-01	0.05569
1994-04-01	0.05064
1994-07-01	0.05228
1994-10-01	0.12782
1995-01-01	0.11818
1995-04-01	0.07448
1995-07-01	0.04176
1995-10-01	0.05339
1996-01-01	0.02784
1996-04-01	0.01756
1996-10-01	0.00219
1997-01-01	0.02994
1997-04-01	0.00693
1997-07-01	0.00997
1997-10-01	0.04991
1998-01-01	0.01599
1998-04-01	0.08881
1998-07-01	0.09776
1998-10-01	0.14835
1999-01-01	0.08384
1999-04-01	0.03936
1999-07-01	0.01704
1999-10-01	0.01352
2000-01-01	0.01284
2000-04-01	0.05516
2000-07-01	0.03551
2000-10-01	0.15980
2001-01-01	0.15662
2001-04-01	0.12813
2001-07-01	0.13873
2001-10-01	0.08861
2002-01-01	0.09236
2002-04-01	0.10540
2002-07-01	0.10421
2003-01-01	0.01027
2003-04-01	0.02076
2003-07-01	0.02118
2003-10-01	0.01175
2004-04-01	0.01799
2004-07-01	0.00500
2004-10-01	0.00549
2005-01-01	0.06139
2005-04-01	0.05819
2005-07-01	0.05787
2006-04-01	0.00460
2006-07-01	0.02164
2006-10-01	0.01775
2007-01-01	0.01796
2007-04-01	0.01824
2007-07-01	0.09183
2007-10-01	0.09687
2008-01-01	0.12190
2008-04-01	1.11606
2008-07-01	1.51577
2008-10-01	1.52926
2009-01-01	0.94018
2009-04-01	0.67946
2009-07-01	0.35504
2009-10-01	0.16763
2010-01-01	0.18522
2010-04-01	0.15469
2010-07-01	0.20348
2010-10-01	0.58611
2011-01-01	0.04382
2011-04-01	0.13774
2011-07-01	0.31613
2011-10-01	0.49324
2012-01-01	0.49962
2012-04-01	2.53821
2012-07-01	2.01234
2012-10-01	2.27873
2013-01-01	0.36002
2013-04-01	0.26121
2013-07-01	0.31505
2013-10-01	0.53701
2014-01-01	0.20860
2014-04-01	0.18270
2014-07-01	0.19019
2014-10-01	0.19856
2015-01-01	0.14090
2015-04-01	0.14450