Quarter	Billions of US Dollars
1993-07-01	0.12986
1993-10-01	0.08626
1994-01-01	0.36938
1994-04-01	0.07176
1994-07-01	0.15366
1994-10-01	0.05700
1995-01-01	0.00291
1995-04-01	0.00688
1995-07-01	0.06456
1995-10-01	0.07004
1996-01-01	0.09991
1996-04-01	0.47461
1996-07-01	0.12101
1996-10-01	0.09052
1997-01-01	0.03112
1997-04-01	0.02193
1997-07-01	0.06138
1997-10-01	0.07479
1998-01-01	0.09725
1998-04-01	0.05267
1998-07-01	0.08156
1998-10-01	0.08777
1999-01-01	0.04962
1999-04-01	0.07642
1999-07-01	0.11452
1999-10-01	0.30861
2000-01-01	0.10306
2000-04-01	0.41174
2000-07-01	0.09657
2000-10-01	0.10813
2001-01-01	0.46935
2001-04-01	0.11271
2001-07-01	0.29036
2001-10-01	0.06916
2002-01-01	0.21525
2002-04-01	0.18273
2002-07-01	0.61156
2002-10-01	0.16007
2003-01-01	0.38347
2003-04-01	0.25036
2003-07-01	0.63329
2003-10-01	0.50121
2004-01-01	0.62226
2004-04-01	0.49164
2004-07-01	0.64911
2004-10-01	0.44329
2005-01-01	1.09233
2005-04-01	1.11822
2005-07-01	1.52467
2005-10-01	0.96291
2006-01-01	2.25514
2006-04-01	1.86965
2006-07-01	0.64915
2006-10-01	1.70618
2007-01-01	1.34304
2007-04-01	0.77141
2007-07-01	1.04381
2007-10-01	1.50619
2008-01-01	1.01682
2008-04-01	0.44179
2008-07-01	0.75235
2008-10-01	0.06475
2009-01-01	0.12817
2009-04-01	0.23491
2009-07-01	0.25119
2009-10-01	0.12148
2010-01-01	0.21360
2010-04-01	0.08995
2010-07-01	0.31756
2010-10-01	0.39712
2011-01-01	0.99470
2011-04-01	0.38936
2011-07-01	0.04583
2011-10-01	0.12027
2012-01-01	0.49859
2012-04-01	0.62491
2012-07-01	0.15008
2012-10-01	0.06067
2013-01-01	0.09432
2013-04-01	0.10784
2013-07-01	0.07490
2013-10-01	0.08828
2014-01-01	0.13375
2014-04-01	0.14530
2014-07-01	0.05163
2014-10-01	0.13965
2015-01-01	0.12711
2015-04-01	0.11334