Quarter	Billions of US Dollars
1993-07-01	4.215
1993-10-01	4.446
1994-01-01	4.837
1994-04-01	4.722
1994-07-01	4.304
1994-10-01	3.420
1995-01-01	4.184
1995-04-01	3.851
1995-07-01	5.023
1995-10-01	4.314
1996-01-01	4.786
1996-04-01	5.704
1996-07-01	5.145
1996-10-01	5.935
1997-01-01	5.956
1997-04-01	5.835
1997-07-01	6.923
1997-10-01	7.219
1998-01-01	7.528
1998-04-01	5.088
1998-07-01	5.945
1998-10-01	7.471
1999-01-01	15.002
1999-04-01	17.709
1999-07-01	27.093
1999-10-01	28.337
2000-01-01	31.338
2000-04-01	29.405
2000-07-01	31.550
2000-10-01	34.192
2001-01-01	21.866
2001-04-01	16.564
2001-07-01	19.126
2001-10-01	19.595
2002-01-01	22.244
2002-04-01	26.710
2002-07-01	33.733
2002-10-01	29.152
2003-01-01	34.612
2003-04-01	33.539
2003-07-01	29.896
2003-10-01	27.702
2004-01-01	44.762
2004-04-01	41.092
2004-07-01	38.923
2004-10-01	48.513
2005-01-01	48.759
2005-04-01	43.906
2005-07-01	45.949
2005-10-01	45.079
2006-01-01	44.176
2006-04-01	45.386
2006-07-01	44.491
2006-10-01	45.054
2007-01-01	52.449
2007-04-01	55.976
2007-07-01	96.117
2007-10-01	120.314
2008-01-01	148.878
2008-04-01	150.551
2008-07-01	112.695
2008-10-01	78.568
2009-01-01	87.293
2009-04-01	78.671
2009-07-01	94.988
2009-10-01	65.949
2010-01-01	85.923
2010-04-01	79.671
2010-07-01	72.944
2010-10-01	73.207
2011-01-01	86.103
2011-04-01	55.993
2011-07-01	59.479
2011-10-01	66.489
2012-01-01	138.340
2012-04-01	78.674
2012-07-01	57.650
2012-10-01	55.306
2013-01-01	86.433
2013-04-01	54.285
2013-07-01	37.709
2013-10-01	51.102
2014-01-01	51.038
2014-04-01	53.453
2014-07-01	57.146
2014-10-01	57.382
2015-01-01	68.680
2015-04-01	69.002