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	0.1712
1972-04-01	0.1028
1972-07-01	0.1078
1972-10-01	0.2053
1973-01-01	0.0654
1973-04-01	0.2999
1973-07-01	0.0709
1973-10-01	0.3979
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	0.2011
1976-07-01	0.0805
1976-10-01	0.2393
1977-01-01	0.2175
1977-04-01	0.1954
1977-07-01	0.1423
1977-10-01	0.2427
1978-01-01	0.3872
1978-04-01	0.4783
1978-07-01	0.3801
1978-10-01	0.4858
1979-01-01	0.1968
1979-04-01	0.2193
1979-07-01	0.0953
1979-10-01	0.0150
1980-01-01	0.0817
1980-04-01	0.1919
1980-07-01	0.1237
1980-10-01	0.0818
1981-01-01	0.0885
1982-01-01	0.0602
1982-04-01	0.1976
1982-07-01	0.0880
1982-10-01	0.1146
1983-01-01	0.2007
1983-04-01	0.1532
1983-07-01	0.0893
1983-10-01	0.1838
1984-01-01	0.2641
1984-04-01	0.3583
1984-07-01	0.1541
1984-10-01	0.4472
1985-01-01	0.2305
1985-04-01	0.9425
1985-07-01	0.0971
1986-04-01	0.0907
1986-07-01	0.1050
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	0.0794
1990-07-01	0.0357
1991-01-01	0.9490
1991-04-01	0.0762
1991-07-01	0.2587
1992-01-01	2.6723
1992-04-01	0.1050
1993-10-01	0.6951
1994-01-01	0.7698
1994-07-01	0.0035
1994-10-01	0.8250
1995-01-01	0.4090
1995-04-01	0.5000
1995-07-01	0.3942
1995-10-01	0.5846
1996-01-01	0.1511
1996-04-01	0.1402
1996-07-01	0.7831
1996-10-01	2.3000
1997-01-01	0.2467
1997-04-01	0.9919
1997-07-01	1.1372
1997-10-01	0.4250
1998-01-01	1.8437
1998-04-01	0.4602
1998-07-01	0.4000
1998-10-01	0.2500
1999-01-01	0.8980
1999-04-01	2.4580
1999-07-01	0.2143
1999-10-01	1.2871
2000-01-01	2.2108
2000-04-01	1.6500
2000-07-01	0.9094
2000-10-01	0.1000
2001-01-01	0.4619
2001-04-01	3.2634
2001-07-01	0.1186
2001-10-01	0.1617
2002-01-01	1.1314
2002-04-01	1.9500
2002-07-01	0.8383
2002-10-01	0.5802
2003-01-01	0.4078
2003-04-01	2.6634
2003-07-01	0.7075
2003-10-01	0.9500
2004-01-01	2.9970
2004-04-01	2.8559
2004-07-01	0.0000
2004-10-01	2.7067
2005-01-01	1.9918
2005-04-01	4.4211
2005-07-01	4.1700
2005-10-01	7.9463
2006-01-01	6.6500
2006-04-01	6.2216
2006-07-01	3.4820
2006-10-01	14.6391
2007-01-01	4.6891
2007-04-01	8.5316
2007-07-01	9.1741
2007-10-01	6.8187
2008-01-01	3.7693
2008-04-01	10.0318
2008-07-01	2.0032
2008-10-01	0.0821
2009-01-01	2.2550
2009-04-01	13.5360
2009-07-01	8.9471
2009-10-01	9.6456
2010-01-01	5.9913
2010-04-01	6.2794
2010-07-01	9.1574
2010-10-01	6.3649
2011-01-01	7.3392
2011-04-01	7.3844
2011-07-01	0.6285
2011-10-01	14.4944
2012-01-01	9.6699
2012-04-01	1.1704
2012-07-01	12.0728
2012-10-01	17.2892
2013-01-01	11.7110
2013-04-01	9.8212
2013-07-01	9.1662
2013-10-01	10.5334
2014-01-01	5.6167
2014-04-01	23.7348
2014-07-01	11.0901
2014-10-01	14.0345
2015-01-01	12.1008
2015-04-01	14.7995