Quarter	Billions of US Dollars
1993-07-01	76.164
1993-10-01	80.245
1994-01-01	81.120
1994-04-01	81.236
1994-07-01	85.871
1994-10-01	82.685
1995-01-01	82.941
1995-04-01	83.384
1995-07-01	84.742
1995-10-01	83.100
1996-01-01	83.488
1996-04-01	81.724
1996-07-01	79.504
1996-10-01	76.142
1997-01-01	75.048
1997-04-01	73.868
1997-07-01	72.283
1997-10-01	66.954
1998-01-01	63.511
1998-04-01	61.345
1998-07-01	57.561
1998-10-01	55.141
1999-01-01	54.987
1999-04-01	58.501
1999-07-01	57.309
1999-10-01	56.178
2000-01-01	55.879
2000-04-01	54.726
2000-07-01	52.200
2000-10-01	51.064
2001-01-01	46.776
2001-04-01	49.425
2001-07-01	46.370
2001-10-01	45.586
2002-01-01	47.280
2002-04-01	50.444
2002-07-01	48.780
2002-10-01	49.570
2003-01-01	52.913
2003-04-01	64.962
2003-07-01	69.456
2003-10-01	75.180
2004-01-01	80.429
2004-04-01	82.657
2004-07-01	94.778
2004-10-01	108.677
2005-01-01	117.872
2005-04-01	121.143
2005-07-01	135.758
2005-10-01	141.095
2006-01-01	149.441
2006-04-01	163.735
2006-07-01	170.281
2006-10-01	172.712
2007-01-01	189.078
2007-04-01	222.170
2007-07-01	241.762
2007-10-01	253.736
2008-01-01	251.998
2008-04-01	272.353
2008-07-01	257.877
2008-10-01	218.902
2009-01-01	215.398
2009-04-01	243.259
2009-07-01	261.665
2009-10-01	277.427
2010-01-01	285.151
2010-04-01	286.145
2010-07-01	296.135
2010-10-01	316.469
2011-01-01	325.536
2011-04-01	338.169
2011-07-01	304.935
2011-10-01	311.508
2012-01-01	323.084
2012-04-01	299.732
2012-07-01	312.333
2012-10-01	287.619
2013-01-01	282.362
2013-04-01	257.165
2013-07-01	269.077
2013-10-01	261.566
2014-01-01	244.019
2014-04-01	246.699
2014-07-01	222.186
2014-10-01	207.525
2015-01-01	181.214
2015-04-01	179.541