Quarter	Billions of US Dollars
1989-07-01	0.4300
1989-10-01	0.2510
1990-01-01	0.4760
1990-04-01	0.5320
1990-07-01	0.7170
1990-10-01	0.8580
1991-01-01	1.2610
1991-04-01	0.8790
1991-07-01	0.7890
1991-10-01	0.6350
1992-01-01	0.7760
1992-04-01	0.6790
1992-07-01	0.2950
1992-10-01	0.5050
1993-01-01	0.5790
1993-04-01	0.3980
1993-07-01	0.5262
1993-10-01	0.8356
1994-01-01	2.8487
1994-04-01	3.6890
1994-07-01	3.5108
1994-10-01	3.9846
1995-01-01	5.0045
1995-04-01	6.4161
1995-07-01	6.1617
1995-10-01	7.2742
1996-01-01	8.1819
1996-04-01	12.1324
1996-07-01	12.1036
1996-10-01	12.6676
1997-01-01	14.4152
1997-04-01	14.6499
1997-07-01	13.9299
1997-10-01	14.8873
1998-01-01	14.6243
1998-04-01	12.3495
1998-07-01	15.8324
1998-10-01	18.8898
1999-01-01	15.9600
1999-04-01	20.2189
1999-07-01	27.5862
1999-10-01	34.0694
2000-01-01	36.1739
2000-04-01	55.1005
2000-07-01	56.6729
2000-10-01	54.7433
2001-01-01	44.4565
2001-04-01	49.7396
2001-07-01	53.4819
2001-10-01	46.1387
2002-01-01	34.3235
2002-04-01	33.3755
2002-07-01	28.7457
2002-10-01	23.3210
2003-01-01	20.7238
2003-04-01	19.4743
2003-07-01	16.8687
2003-10-01	17.2070
2004-01-01	16.2711
2004-04-01	16.4737
2004-07-01	13.4579
2004-10-01	14.1221
2005-01-01	16.4367
2005-04-01	13.9455
2005-07-01	16.8235
2005-10-01	10.4431
2006-01-01	11.0157
2006-04-01	11.9131
2006-07-01	14.4362
2006-10-01	14.1658
2007-01-01	21.3778
2007-04-01	22.9163
2007-07-01	22.9057
2007-10-01	33.9391
2008-01-01	45.0246
2008-04-01	51.1031
2008-07-01	47.7084
2008-10-01	32.6302
2009-01-01	25.4813
2009-04-01	21.4483
2009-07-01	17.4311
2009-10-01	16.9028
2010-01-01	19.2647
2010-04-01	19.7428
2010-07-01	23.4233
2010-10-01	21.4246
2011-01-01	18.1500
2011-04-01	20.0595
2011-07-01	22.6560
2011-10-01	20.2120
2012-01-01	16.1524
2012-04-01	16.3911
2012-07-01	15.7748
2012-10-01	14.4129
2013-01-01	13.2904
2013-04-01	11.8691
2013-07-01	12.3456
2013-10-01	12.7302
2014-01-01	11.9728
2014-04-01	14.9133
2014-07-01	14.6657
2014-10-01	9.5367
2015-01-01	10.3993
2015-04-01	9.5405