Quarter	Billions of US Dollars
1996-01-01	0.05000
1996-04-01	0.75023
1996-07-01	0.74360
1996-10-01	0.98190
1997-01-01	0.93602
1997-04-01	1.19164
1997-07-01	1.15578
1997-10-01	1.11240
1998-01-01	1.10570
1998-04-01	1.07030
1998-07-01	1.09786
1998-10-01	1.20443
1999-01-01	1.17971
1999-04-01	0.52500
1999-07-01	0.56172
1999-10-01	0.57823
2000-01-01	0.57191
2000-04-01	0.57698
2000-07-01	0.57444
2000-10-01	0.56136
2001-01-01	0.49509
2001-04-01	0.50027
2001-07-01	0.51409
2001-10-01	0.26687
2002-01-01	0.27119
2002-04-01	0.27559
2002-07-01	0.28005
2002-10-01	0.28458
2003-01-01	0.28919
2003-04-01	0.29388
2003-07-01	0.29864
2003-10-01	0.30347
2004-01-01	0.30839
2004-04-01	0.31338
2004-07-01	0.31845
2004-10-01	0.32361
2005-01-01	0.32885
2005-04-01	0.33418
2005-07-01	0.33959
2005-10-01	0.34509
2006-01-01	0.35068
2006-04-01	0.35636
2006-07-01	0.36213
2006-10-01	0.36799
2007-01-01	0.37395
2009-10-01	0.04703
2010-01-01	0.06126
2010-04-01	0.09504
2010-07-01	0.08391
2010-10-01	0.12534
2011-01-01	0.17283
2011-04-01	0.21690
2011-07-01	0.22757
2011-10-01	0.22852
2012-01-01	0.32479
2012-04-01	0.30374
2012-07-01	0.30814
2012-10-01	0.31339
2013-01-01	0.30598
2013-04-01	0.30051
2013-07-01	0.30650
2013-10-01	0.31178
2014-01-01	0.26523
2014-04-01	0.22992
2014-07-01	0.21135
2014-10-01	0.18252
2015-01-01	0.13384
2015-04-01	0.13435