Quarter	Billions of US Dollars
1966-07-01	0.0150
1967-01-01	0.0138
1972-04-01	0.0325
1972-07-01	0.0345
1972-10-01	0.0416
1973-01-01	0.0266
1973-04-01	0.0600
1973-07-01	0.0429
1973-10-01	0.0435
1974-01-01	0.0518
1974-04-01	0.1127
1974-07-01	0.1361
1974-10-01	0.2806
1975-01-01	0.3992
1975-04-01	0.5238
1975-07-01	0.1082
1976-01-01	0.1003
1976-04-01	0.0644
1976-07-01	0.1446
1976-10-01	0.3270
1977-01-01	0.3424
1977-04-01	0.2933
1977-07-01	0.4066
1977-10-01	0.2970
1978-01-01	0.2926
1978-04-01	0.3596
1978-07-01	0.3666
1978-10-01	0.3337
1979-01-01	0.3560
1979-04-01	0.2396
1979-07-01	0.3907
1979-10-01	0.3182
1980-01-01	0.3573
1980-04-01	0.5255
1980-07-01	0.5052
1980-10-01	0.3571
1981-01-01	0.3324
1981-04-01	0.4192
1981-07-01	0.3093
1981-10-01	0.4769
1982-01-01	0.6402
1982-04-01	0.4120
1982-07-01	0.3099
1982-10-01	0.1245
1983-01-01	0.5092
1983-04-01	0.3443
1983-07-01	0.1661
1983-10-01	0.1113
1984-01-01	0.5109
1984-04-01	0.5414
1984-07-01	0.1360
1984-10-01	0.4096
1985-01-01	0.4933
1985-04-01	0.6070
1985-07-01	0.4927
1985-10-01	0.4447
1986-01-01	1.2518
1986-04-01	0.8396
1986-07-01	0.9636
1986-10-01	0.4565
1987-01-01	1.8216
1987-04-01	0.8319
1987-07-01	0.9122
1987-10-01	1.3104
1988-01-01	2.7975
1988-04-01	1.4932
1988-07-01	0.7335
1988-10-01	0.6837
1989-01-01	1.3240
1989-04-01	0.9079
1989-07-01	0.6958
1989-10-01	1.1916
1990-01-01	1.4071
1990-04-01	1.3311
1990-07-01	0.7105
1990-10-01	0.8343
1991-01-01	2.0261
1991-04-01	0.9992
1991-07-01	1.0796
1991-10-01	1.0101
1992-01-01	2.4191
1992-04-01	2.3075
1992-07-01	1.4897
1992-10-01	1.9173
1993-01-01	1.9345
1993-04-01	2.3181
1993-07-01	2.5548
1993-10-01	3.3679
1994-01-01	2.3413
1994-04-01	1.3634
1994-07-01	0.9311
1994-10-01	4.0557
1995-01-01	4.2078
1995-04-01	2.5230
1995-07-01	1.6724
1995-10-01	1.4135
1996-01-01	5.2926
1996-04-01	1.0067
1996-07-01	1.9830
1996-10-01	2.0815
1997-01-01	3.1714
1997-04-01	1.5546
1997-07-01	1.7824
1997-10-01	0.8899
1998-01-01	5.4199
1998-04-01	1.7514
1998-07-01	2.0621
1998-10-01	4.1055
1999-01-01	7.5894
1999-04-01	5.0080
1999-07-01	2.8931
1999-10-01	2.1482
2000-01-01	5.9486
2000-04-01	4.2802
2000-07-01	4.1538
2000-10-01	1.7819
2001-01-01	8.4313
2001-04-01	2.3653
2001-07-01	3.5405
2001-10-01	7.3821
2002-01-01	11.7356
2002-04-01	6.0410
2002-07-01	2.6942
2002-10-01	4.1024
2003-01-01	8.8855
2003-04-01	14.1482
2003-07-01	8.0817
2003-10-01	6.9684
2004-01-01	14.0239
2004-04-01	7.2130
2004-07-01	3.7233
2004-10-01	5.9355
2005-01-01	21.0743
2005-04-01	15.7841
2005-07-01	6.3370
2005-10-01	9.8711
2006-01-01	16.2480
2006-04-01	13.9040
2006-07-01	11.1976
2006-10-01	18.4126
2007-01-01	30.4657
2007-04-01	11.0931
2007-07-01	11.1648
2007-10-01	13.0735
2008-01-01	14.5912
2008-04-01	9.1639
2008-07-01	5.2315
2008-10-01	9.7384
2009-01-01	18.0236
2009-04-01	19.1316
2009-07-01	9.6121
2009-10-01	4.3899
2010-01-01	12.4670
2010-04-01	3.9100
2010-07-01	5.2230
2010-10-01	4.5401
2011-01-01	14.8893
2011-04-01	10.1046
2011-07-01	4.3677
2011-10-01	7.0097
2012-01-01	7.8187
2012-04-01	13.7112
2012-07-01	7.6875
2012-10-01	6.4957
2013-01-01	3.6524
2013-04-01	18.4975
2013-07-01	9.7547
2013-10-01	10.6219
2014-01-01	3.9279
2014-04-01	11.3177
2014-07-01	8.8350
2014-10-01	7.6799
2015-01-01	5.9606
2015-04-01	1.9436