Quarter	Billions of US Dollars
1989-07-01	4.6050
1989-10-01	6.7390
1990-01-01	7.8740
1990-04-01	6.6460
1990-07-01	7.8700
1990-10-01	7.1430
1991-01-01	7.8570
1991-04-01	6.1260
1991-07-01	5.9830
1991-10-01	7.4540
1992-01-01	5.7770
1992-04-01	6.3980
1992-07-01	7.9090
1992-10-01	6.3660
1993-01-01	6.0890
1993-04-01	6.1970
1993-07-01	5.9649
1993-10-01	5.7124
1994-01-01	5.0747
1994-04-01	4.4160
1994-07-01	5.2397
1994-10-01	3.7579
1995-01-01	3.9596
1995-04-01	5.8170
1995-07-01	5.7450
1995-10-01	5.6992
1996-01-01	6.1802
1996-04-01	5.4992
1996-07-01	7.0923
1996-10-01	5.7679
1997-01-01	6.0379
1997-04-01	7.1411
1997-07-01	6.6127
1997-10-01	5.3493
1998-01-01	6.4506
1998-04-01	4.0519
1998-07-01	5.4626
1998-10-01	6.7678
1999-01-01	5.9605
1999-04-01	5.3222
1999-07-01	5.9322
1999-10-01	6.6993
2000-01-01	7.6426
2000-04-01	7.1197
2000-07-01	6.2243
2000-10-01	6.9282
2001-01-01	7.6209
2001-04-01	5.4709
2001-07-01	5.6471
2001-10-01	5.7191
2002-01-01	5.2021
2002-04-01	5.7249
2002-07-01	6.5249
2002-10-01	6.6686
2003-01-01	7.0559
2003-04-01	7.1696
2003-07-01	5.2681
2003-10-01	6.0931
2004-01-01	8.3288
2004-04-01	7.1377
2004-07-01	9.9286
2004-10-01	9.6217
2005-01-01	9.2751
2005-04-01	8.0299
2005-07-01	9.0701
2005-10-01	10.0999
2006-01-01	11.1804
2006-04-01	11.2817
2006-07-01	10.2011
2006-10-01	10.5759
2007-01-01	9.6537
2007-04-01	8.8951
2007-07-01	10.9272
2007-10-01	10.8860
2008-01-01	12.6202
2008-04-01	15.1419
2008-07-01	12.0017
2008-10-01	9.7414
2009-01-01	8.7186
2009-04-01	10.9459
2009-07-01	12.1163
2009-10-01	10.0390
2010-01-01	10.7037
2010-04-01	11.0139
2010-07-01	12.2513
2010-10-01	8.9313
2011-01-01	10.6999
2011-04-01	11.8970
2011-07-01	11.9495
2011-10-01	12.2969
2012-01-01	11.4455
2012-04-01	10.3800
2012-07-01	12.3079
2012-10-01	12.2972
2013-01-01	11.5039
2013-04-01	10.8325
2013-07-01	9.9834
2013-10-01	8.3797
2014-01-01	11.1657
2014-04-01	11.0916
2014-07-01	13.7142
2014-10-01	11.1671
2015-01-01	10.5162
2015-04-01	11.5105