Quarter	Billions of US Dollars
1993-07-01	36.0553
1993-10-01	35.7613
1994-01-01	36.0203
1994-04-01	36.1981
1994-07-01	36.8172
1994-10-01	36.4543
1995-01-01	36.4149
1995-04-01	36.9490
1995-07-01	38.7212
1995-10-01	39.7585
1996-01-01	42.8757
1996-04-01	42.9899
1996-07-01	50.4770
1996-10-01	50.8746
1997-01-01	52.3039
1997-04-01	54.9814
1997-07-01	48.9011
1997-10-01	49.1558
1998-01-01	49.6199
1998-04-01	49.6292
1998-07-01	50.1998
1998-10-01	50.5278
1999-01-01	50.5020
1999-04-01	52.7736
1999-07-01	54.0109
1999-10-01	54.7899
2000-01-01	56.0070
2000-04-01	55.4410
2000-07-01	56.1902
2000-10-01	55.0210
2001-01-01	58.5935
2001-04-01	54.3209
2001-07-01	55.9918
2001-10-01	50.1560
2002-01-01	51.1990
2002-04-01	48.7972
2002-07-01	49.3785
2002-10-01	50.7215
2003-01-01	43.8185
2003-04-01	42.0255
2003-07-01	39.4202
2003-10-01	40.8759
2004-01-01	42.1061
2004-04-01	42.9676
2004-07-01	43.3595
2004-10-01	44.6548
2005-01-01	45.1892
2005-04-01	44.2399
2005-07-01	44.1691
2005-10-01	43.6543
2006-01-01	44.1369
2006-04-01	43.7469
2006-07-01	42.4017
2006-10-01	42.4583
2007-01-01	40.5098
2007-04-01	40.6427
2007-07-01	42.0603
2007-10-01	42.0948
2008-01-01	42.1130
2008-04-01	41.7787
2008-07-01	40.2697
2008-10-01	40.7013
2009-01-01	39.4055
2009-04-01	39.4238
2009-07-01	41.4067
2009-10-01	42.9263
2010-01-01	39.8516
2010-04-01	40.5754
2010-07-01	42.3099
2010-10-01	45.0836
2011-01-01	44.8091
2011-04-01	46.0312
2011-07-01	46.8308
2011-10-01	46.5463
2012-01-01	49.2708
2012-04-01	49.8269
2012-07-01	50.0905
2012-10-01	49.6605
2013-01-01	48.8826
2013-04-01	49.4384
2013-07-01	50.4970
2013-10-01	54.1953
2014-01-01	56.6780
2014-04-01	57.9267
2014-07-01	56.2899
2014-10-01	57.5203
2015-01-01	61.8578
2015-04-01	62.9139