Quarter	Billions of US Dollars
1993-07-01	1.3911
1993-10-01	2.2495
1994-01-01	2.6414
1994-04-01	2.8162
1994-07-01	3.4802
1994-10-01	3.6540
1995-01-01	3.4930
1995-04-01	3.2331
1995-07-01	3.1407
1995-10-01	3.4782
1996-01-01	3.5156
1996-04-01	3.7037
1996-07-01	3.7617
1996-10-01	3.7326
1997-01-01	3.8491
1997-04-01	3.9990
1997-07-01	4.7006
1997-10-01	4.5325
1998-01-01	4.4729
1998-04-01	4.3986
1998-07-01	4.5213
1998-10-01	4.8388
1999-01-01	5.5753
1999-04-01	5.5107
1999-07-01	6.6228
1999-10-01	6.6254
2000-01-01	7.2422
2000-04-01	7.2120
2000-07-01	7.2033
2000-10-01	7.1947
2001-01-01	6.8268
2001-04-01	9.5593
2001-07-01	9.5972
2001-10-01	11.2164
2002-01-01	13.3461
2002-04-01	14.4103
2002-07-01	14.0559
2002-10-01	14.0958
2003-01-01	14.5320
2003-04-01	14.9716
2003-07-01	15.6707
2003-10-01	15.6293
2004-01-01	16.1581
2004-04-01	15.7262
2004-07-01	15.4709
2004-10-01	15.5413
2005-01-01	15.6201
2005-04-01	16.1397
2005-07-01	16.0333
2005-10-01	15.7909
2006-01-01	15.8769
2006-04-01	15.6446
2006-07-01	15.4770
2006-10-01	16.0733
2007-01-01	16.4028
2007-04-01	16.9996
2007-07-01	17.0135
2007-10-01	16.9886
2008-01-01	16.3515
2008-04-01	16.1399
2008-07-01	16.4331
2008-10-01	16.2052
2009-01-01	15.4069
2009-04-01	17.6497
2009-07-01	17.0288
2009-10-01	17.8084
2010-01-01	17.7203
2010-04-01	18.2631
2010-07-01	18.6485
2010-10-01	19.2166
2011-01-01	17.2393
2011-04-01	18.5183
2011-07-01	18.2875
2011-10-01	18.2070
2012-01-01	19.4247
2012-04-01	19.4948
2012-07-01	19.8705
2012-10-01	20.0880
2013-01-01	19.5842
2013-04-01	19.7334
2013-07-01	19.0350
2013-10-01	19.6605
2014-01-01	19.0640
2014-04-01	18.8741
2014-07-01	18.7009
2014-10-01	17.7576
2015-01-01	17.2671
2015-04-01	17.4596