Quarter	Billions of US Dollars
1989-10-01	91.082
1990-01-01	86.585
1990-04-01	82.588
1990-07-01	94.704
1990-10-01	88.637
1991-01-01	94.159
1991-04-01	85.874
1991-07-01	89.555
1991-10-01	83.522
1992-01-01	87.925
1992-04-01	82.312
1992-07-01	80.101
1992-10-01	79.258
1993-01-01	78.234
1993-04-01	70.988
1993-07-01	69.319
1993-10-01	72.815
1994-01-01	80.027
1994-04-01	80.925
1994-07-01	85.922
1994-10-01	92.802
1995-01-01	84.925
1995-04-01	80.359
1995-07-01	91.406
1995-10-01	92.111
1996-01-01	102.576
1996-04-01	102.391
1996-07-01	104.756
1996-10-01	109.472
1997-01-01	107.326
1997-04-01	101.732
1997-07-01	101.170
1997-10-01	95.521
1998-01-01	97.958
1998-04-01	92.902
1998-07-01	94.189
1998-10-01	101.716
1999-01-01	110.482
1999-04-01	118.120
1999-07-01	125.664
1999-10-01	130.172
2000-01-01	122.616
2000-04-01	121.617
2000-07-01	108.501
2000-10-01	107.137
2001-01-01	97.404
2001-04-01	98.574
2001-07-01	96.301
2001-10-01	105.083
2002-01-01	113.608
2002-04-01	120.877
2002-07-01	122.373
2002-10-01	126.572
2003-01-01	136.691
2003-04-01	157.541
2003-07-01	164.676
2003-10-01	188.887
2004-01-01	200.777
2004-04-01	181.085
2004-07-01	195.735
2004-10-01	225.124
2005-01-01	226.208
2005-04-01	225.385
2005-07-01	223.458
2005-10-01	223.515
2006-01-01	225.172
2006-04-01	242.677
2006-07-01	245.530
2006-10-01	274.070
2007-01-01	281.133
2007-04-01	313.277
2007-07-01	409.807
2007-10-01	464.227
2008-01-01	474.977
2008-04-01	480.010
2008-07-01	410.727
2008-10-01	333.617
2009-01-01	298.161
2009-04-01	357.259
2009-07-01	368.958
2009-10-01	370.303
2010-01-01	357.763
2010-04-01	321.515
2010-07-01	346.420
2010-10-01	374.747
2011-01-01	376.103
2011-04-01	384.956
2011-07-01	345.789
2011-10-01	353.765
2012-01-01	373.015
2012-04-01	363.759
2012-07-01	363.376
2012-10-01	360.051
2013-01-01	346.608
2013-04-01	303.294
2013-07-01	297.273
2013-10-01	272.621
2014-01-01	284.565
2014-04-01	292.112
2014-07-01	275.040
2014-10-01	259.072
2015-01-01	232.010