Quarter	Billions of US Dollars
1993-07-01	1.971
1993-10-01	2.218
1994-01-01	1.541
1994-04-01	3.878
1994-07-01	3.842
1994-10-01	3.609
1995-01-01	5.003
1995-04-01	2.651
1995-07-01	4.327
1995-10-01	6.059
1996-01-01	8.144
1996-04-01	8.430
1996-07-01	9.234
1996-10-01	7.806
1997-01-01	9.042
1997-04-01	11.686
1997-07-01	10.805
1997-10-01	10.298
1998-01-01	10.623
1998-04-01	16.130
1998-07-01	15.570
1998-10-01	11.745
1999-01-01	38.641
1999-04-01	55.328
1999-07-01	42.047
1999-10-01	39.521
2000-01-01	35.772
2000-04-01	48.279
2000-07-01	47.412
2000-10-01	51.416
2001-01-01	59.730
2001-04-01	62.274
2001-07-01	46.607
2001-10-01	82.485
2002-01-01	57.615
2002-04-01	65.690
2002-07-01	51.826
2002-10-01	74.944
2003-01-01	93.392
2003-04-01	110.857
2003-07-01	100.182
2003-10-01	132.045
2004-01-01	142.037
2004-04-01	152.977
2004-07-01	152.973
2004-10-01	165.308
2005-01-01	177.064
2005-04-01	227.422
2005-07-01	114.841
2005-10-01	207.730
2006-01-01	199.583
2006-04-01	229.615
2006-07-01	222.985
2006-10-01	303.866
2007-01-01	324.713
2007-04-01	324.873
2007-07-01	129.964
2007-10-01	144.669
2008-01-01	149.299
2008-04-01	286.290
2008-07-01	173.484
2008-10-01	343.523
2009-01-01	157.785
2009-04-01	159.205
2009-07-01	106.787
2009-10-01	112.953
2010-01-01	162.952
2010-04-01	133.196
2010-07-01	136.678
2010-10-01	123.640
2011-01-01	129.586
2011-04-01	123.488
2011-07-01	98.276
2011-10-01	109.664
2012-01-01	126.872
2012-04-01	74.871
2012-07-01	79.510
2012-10-01	76.330
2013-01-01	70.326
2013-04-01	95.793
2013-07-01	72.533
2013-10-01	91.158
2014-01-01	108.751
2014-04-01	116.617
2014-07-01	68.377
2014-10-01	80.256
2015-01-01	102.584
2015-04-01	89.016