Quarter	Billions of US Dollars
1971-01-01	0.0856
1971-04-01	0.0506
1971-07-01	0.0245
1971-10-01	0.0506
1972-01-01	0.1212
1972-04-01	0.1028
1972-07-01	0.1078
1972-10-01	0.1753
1973-01-01	0.0354
1973-04-01	0.2999
1973-07-01	0.0709
1973-10-01	0.3849
1974-01-01	0.1087
1974-04-01	0.4595
1974-07-01	0.0304
1974-10-01	0.0724
1975-01-01	0.1026
1975-04-01	0.3453
1975-07-01	0.1378
1975-10-01	0.0918
1976-01-01	0.1001
1976-04-01	0.2113
1976-07-01	0.1105
1976-10-01	0.2393
1977-01-01	0.2175
1977-04-01	0.1954
1977-07-01	0.1723
1977-10-01	0.2427
1978-01-01	0.3872
1978-04-01	0.4783
1978-07-01	0.4167
1978-10-01	0.5458
1979-01-01	0.2568
1979-04-01	0.3090
1979-07-01	0.1171
1979-10-01	0.0150
1980-01-01	0.0817
1980-04-01	0.1919
1980-07-01	0.1637
1980-10-01	0.1218
1981-01-01	0.0955
1981-04-01	0.0150
1981-07-01	0.1100
1982-01-01	0.0602
1982-04-01	0.2726
1982-07-01	0.0880
1982-10-01	0.1146
1983-01-01	0.2007
1983-04-01	0.2282
1983-07-01	0.1493
1983-10-01	0.2288
1984-01-01	0.2641
1984-04-01	0.3583
1984-07-01	0.1941
1984-10-01	0.4472
1985-01-01	0.2620
1985-04-01	1.0025
1985-07-01	0.0971
1985-10-01	0.0120
1986-04-01	0.0907
1986-07-01	0.1050
1987-01-01	0.0200
1987-07-01	0.0150
1988-01-01	0.1522
1988-04-01	0.1289
1988-07-01	0.3421
1988-10-01	0.1039
1989-01-01	0.0770
1989-04-01	0.0811
1989-07-01	0.2544
1990-07-01	0.1182
1991-01-01	0.9490
1991-04-01	0.0762
1991-07-01	0.2587
1992-01-01	2.6723
1992-04-01	0.3266
1993-04-01	0.2340
1993-07-01	0.0500
1993-10-01	0.6951
1994-01-01	0.7698
1994-07-01	0.3635
1994-10-01	0.9250
1995-01-01	0.4090
1995-04-01	0.5000
1995-07-01	0.7442
1995-10-01	0.6846
1996-01-01	0.5511
1996-04-01	0.1402
1996-07-01	1.2061
1996-10-01	2.4079
1997-01-01	0.2250
1997-04-01	1.6501
1997-07-01	1.2399
1997-10-01	0.9000
1998-01-01	1.9679
1998-04-01	0.7681
1998-07-01	0.6426
1998-10-01	0.5000
1999-01-01	1.6924
1999-04-01	2.6185
1999-07-01	0.5761
1999-10-01	1.7013
2000-01-01	2.9101
2000-04-01	1.7200
2000-07-01	1.4508
2000-10-01	0.1000
2001-01-01	1.2993
2001-04-01	4.2262
2001-07-01	0.9600
2001-10-01	1.0936
2002-01-01	1.3766
2002-04-01	3.2808
2002-07-01	0.9839
2002-10-01	2.1576
2003-01-01	1.5821
2003-04-01	3.9141
2003-07-01	4.4704
2003-10-01	1.2655
2004-01-01	7.1927
2004-04-01	4.2998
2004-07-01	0.1334
2004-10-01	4.2471
2005-01-01	3.4627
2005-04-01	4.4326
2005-07-01	8.7004
2005-10-01	8.6646
2006-01-01	7.8410
2006-04-01	8.7053
2006-07-01	4.0575
2006-10-01	18.8293
2007-01-01	10.4263
2007-04-01	11.5659
2007-07-01	11.7145
2007-10-01	9.9351
2008-01-01	4.0298
2008-04-01	12.3385
2008-07-01	5.7819
2008-10-01	1.1897
2009-01-01	2.3198
2009-04-01	22.1471
2009-07-01	10.4025
2009-10-01	18.1679
2010-01-01	6.7078
2010-04-01	9.3580
2010-07-01	14.4214
2010-10-01	14.6666
2011-01-01	14.0039
2011-04-01	10.3294
2011-07-01	2.4748
2011-10-01	20.8673
2012-01-01	16.2897
2012-04-01	6.3858
2012-07-01	14.2263
2012-10-01	24.1772
2013-01-01	17.6124
2013-04-01	13.1010
2013-07-01	13.9036
2013-10-01	17.5241
2014-01-01	6.2358
2014-04-01	32.3127
2014-07-01	14.1063
2014-10-01	14.8114
2015-01-01	21.5079
2015-04-01	15.3599