Quarter	Billions of US Dollars
1993-07-01	0.21866
1993-10-01	0.18292
1994-01-01	0.42355
1994-04-01	0.76578
1994-07-01	0.87101
1994-10-01	0.70943
1995-01-01	0.60094
1995-04-01	0.36553
1995-07-01	0.35911
1995-10-01	0.35653
1996-01-01	0.48111
1996-04-01	0.37868
1996-07-01	0.33664
1996-10-01	0.49437
1997-01-01	0.20289
1997-04-01	0.22934
1997-07-01	0.25285
1997-10-01	0.10753
1998-01-01	0.18939
1998-04-01	0.20933
1998-07-01	0.21129
1998-10-01	0.21783
1999-01-01	0.41000
1999-04-01	0.47288
1999-07-01	0.49405
1999-10-01	1.09883
2000-01-01	1.10035
2000-04-01	1.12248
2000-07-01	1.17850
2000-10-01	0.63520
2001-01-01	0.31219
2001-04-01	0.32188
2001-07-01	0.64828
2001-10-01	0.58257
2002-01-01	0.58401
2002-04-01	0.52455
2002-07-01	0.21262
2002-10-01	0.40244
2003-01-01	0.40244
2003-04-01	0.70401
2003-07-01	1.37967
2003-10-01	1.23672
2004-01-01	1.17225
2004-04-01	0.79660
2004-07-01	0.06988
2004-10-01	0.34430
2005-01-01	0.38423
2005-04-01	0.75930
2005-07-01	0.98467
2005-10-01	0.75243
2006-01-01	0.71331
2006-04-01	0.41419
2006-07-01	0.16460
2006-10-01	0.47074
2007-01-01	1.14162
2007-04-01	1.42945
2007-07-01	1.44481
2007-10-01	1.15615
2008-01-01	1.17545
2008-04-01	0.92064
2008-07-01	2.08651
2008-10-01	1.92871
2009-01-01	2.17871
2009-04-01	2.21741
2009-07-01	1.05806
2009-10-01	1.66112
2010-01-01	3.16105
2010-04-01	3.12556
2010-07-01	3.45798
2010-10-01	3.41513
2011-01-01	1.36699
2011-04-01	2.08674
2011-07-01	1.73609
2011-10-01	1.23271
2012-01-01	1.82929
2012-04-01	1.43778
2012-07-01	2.21639
2012-10-01	2.10764
2013-01-01	1.83776
2013-04-01	2.06711
2013-07-01	1.27449
2013-10-01	1.53987
2014-01-01	1.38732
2014-04-01	1.06800
2014-07-01	1.08911
2014-10-01	0.58541
2015-01-01	0.43246
2015-04-01	0.81450