Quarter	Billions of US Dollars
1995-10-01	15.235
1996-01-01	16.157
1996-04-01	15.816
1996-07-01	17.014
1996-10-01	16.578
1997-01-01	18.839
1997-04-01	15.841
1997-07-01	17.814
1997-10-01	16.152
1998-01-01	14.840
1998-04-01	14.304
1998-07-01	15.094
1998-10-01	13.006
1999-01-01	12.620
1999-04-01	12.719
1999-07-01	14.169
1999-10-01	14.248
2000-01-01	12.985
2000-04-01	11.809
2000-07-01	11.321
2000-10-01	12.068
2001-01-01	14.284
2001-04-01	12.744
2001-07-01	14.779
2001-10-01	12.929
2002-01-01	14.431
2002-04-01	17.183
2002-07-01	18.370
2002-10-01	19.076
2003-01-01	19.352
2003-04-01	18.445
2003-07-01	20.910
2003-10-01	20.162
2004-01-01	17.345
2004-04-01	18.241
2004-07-01	17.589
2004-10-01	20.812
2005-01-01	18.833
2005-04-01	17.889
2005-07-01	20.421
2005-10-01	17.780
2006-01-01	17.423
2006-04-01	17.549
2006-07-01	17.005
2006-10-01	15.723
2007-01-01	15.814
2007-04-01	16.404
2007-07-01	20.744
2007-10-01	23.323
2008-01-01	24.324
2008-04-01	25.533
2008-07-01	21.486
2008-10-01	25.171
2009-01-01	29.849
2009-04-01	44.082
2009-07-01	60.255
2009-10-01	59.002
2010-01-01	56.619
2010-04-01	53.404
2010-07-01	58.447
2010-10-01	57.524
2011-01-01	56.525
2011-04-01	55.201
2011-07-01	49.116
2011-10-01	46.176
2012-01-01	50.969
2012-04-01	49.933
2012-07-01	51.507
2012-10-01	50.008
2013-01-01	47.099
2013-04-01	41.875
2013-07-01	42.064
2013-10-01	37.969
2014-01-01	31.307
2014-04-01	25.486
2014-07-01	24.342
2014-10-01	19.776
2015-01-01	20.186