Quarter	Billions of US Dollars
1993-07-01	3.5466
1993-10-01	3.3128
1994-01-01	3.0724
1994-04-01	3.1743
1994-07-01	3.1949
1994-10-01	2.9857
1995-01-01	3.2073
1995-04-01	3.1216
1995-07-01	3.0034
1995-10-01	2.7464
1996-01-01	3.2383
1996-04-01	3.0499
1996-07-01	2.6372
1996-10-01	2.5786
1997-01-01	2.7860
1997-04-01	3.0070
1997-07-01	4.1804
1997-10-01	4.2407
1998-01-01	5.1498
1998-04-01	5.1036
1998-07-01	5.5347
1998-10-01	5.1861
1999-01-01	5.0663
1999-04-01	5.7268
1999-07-01	6.4215
1999-10-01	6.5922
2000-01-01	6.3690
2000-04-01	6.8656
2000-07-01	11.6749
2000-10-01	11.9672
2001-01-01	12.2091
2001-04-01	11.8021
2001-07-01	12.9833
2001-10-01	16.0062
2002-01-01	16.6796
2002-04-01	18.6518
2002-07-01	17.8405
2002-10-01	18.0397
2003-01-01	19.9612
2003-04-01	21.0613
2003-07-01	22.3586
2003-10-01	25.3649
2004-01-01	25.7272
2004-04-01	25.3285
2004-07-01	26.3577
2004-10-01	26.0991
2005-01-01	25.9242
2005-04-01	24.2282
2005-07-01	21.6335
2005-10-01	21.4822
2006-01-01	26.5778
2006-04-01	28.1049
2006-07-01	26.9388
2006-10-01	26.4149
2007-01-01	26.2353
2007-04-01	27.0480
2007-07-01	28.2601
2007-10-01	28.6689
2008-01-01	29.4136
2008-04-01	28.6509
2008-07-01	20.8854
2008-10-01	20.1391
2009-01-01	16.9040
2009-04-01	15.2263
2009-07-01	16.5211
2009-10-01	17.7182
2010-01-01	18.7510
2010-04-01	19.2600
2010-07-01	17.7910
2010-10-01	18.9413
2011-01-01	20.8308
2011-04-01	21.4503
2011-07-01	20.6650
2011-10-01	20.3054
2012-01-01	21.8199
2012-04-01	19.5455
2012-07-01	19.0599
2012-10-01	20.5134
2013-01-01	22.6049
2013-04-01	24.5679
2013-07-01	26.1553
2013-10-01	31.4716
2014-01-01	39.3701
2014-04-01	41.1722
2014-07-01	43.2179
2014-10-01	39.9960
2015-01-01	42.9272
2015-04-01	46.1024