Quarter	Billions of US Dollars
1993-07-01	0.06000
1993-10-01	0.06000
1994-01-01	0.06000
1998-01-01	0.02726
1998-04-01	0.02556
1998-07-01	0.07435
1998-10-01	0.07896
1999-01-01	0.04394
1999-04-01	0.07445
1999-07-01	0.03339
1999-10-01	0.03126
2000-01-01	0.02996
2000-04-01	0.13000
2000-07-01	0.13000
2000-10-01	0.13000
2001-01-01	0.13000
2001-07-01	0.01407
2001-10-01	0.01387
2002-01-01	0.07919
2002-04-01	0.08178
2002-07-01	0.08127
2002-10-01	0.10659
2003-01-01	0.04205
2003-04-01	0.04310
2003-07-01	0.03898
2003-10-01	0.01516
2004-01-01	0.02426
2004-04-01	0.02381
2004-07-01	0.00901
2004-10-01	0.01460
2005-01-01	0.03093
2005-04-01	0.21056
2005-07-01	0.20971
2005-10-01	0.20055
2006-01-01	0.18156
2007-01-01	0.01000
2007-04-01	0.25381
2007-07-01	0.29399
2007-10-01	0.32159
2008-01-01	0.38561
2008-04-01	0.10965
2008-07-01	0.16332
2008-10-01	0.15371
2009-01-01	0.18105
2009-04-01	0.18614
2009-07-01	0.20181
2009-10-01	0.21529
2010-01-01	0.28181
2010-04-01	0.26271
2010-07-01	0.24977
2010-10-01	0.31180
2011-01-01	0.16838
2011-04-01	0.12945
2011-07-01	0.07500
2011-10-01	0.06751
2012-01-01	0.11929
2012-04-01	0.09187
2012-07-01	0.11858
2012-10-01	0.07475
2013-01-01	0.02796
2013-04-01	0.05288
2013-07-01	0.06060
2013-10-01	0.13569
2014-01-01	0.13075
2014-04-01	1.09718
2014-07-01	1.14548
2014-10-01	1.04131
2015-01-01	0.95009
2015-04-01	0.23357