Quarter	Billions of US Dollars
1966-01-01	0.0150
1966-04-01	0.0150
1966-07-01	0.0150
1966-10-01	0.0150
1967-01-01	0.0150
1967-04-01	0.0150
1967-07-01	0.0150
1967-10-01	0.0150
1968-01-01	0.0150
1968-04-01	0.0150
1968-07-01	0.0150
1968-10-01	0.0150
1969-01-01	0.0150
1969-04-01	0.0150
1969-07-01	0.0150
1969-10-01	0.0150
1970-01-01	0.0150
1970-04-01	0.0150
1970-07-01	0.0150
1970-10-01	0.0150
1971-01-01	0.0150
1971-04-01	0.0150
1971-07-01	0.0150
1971-10-01	0.0150
1972-01-01	0.0653
1972-04-01	0.0803
1972-07-01	0.0794
1972-10-01	0.0795
1973-01-01	0.0871
1973-04-01	0.0974
1973-07-01	0.0977
1973-10-01	0.0892
1974-01-01	0.0924
1974-04-01	0.0923
1974-07-01	0.1247
1974-10-01	0.2197
1975-01-01	0.2567
1975-04-01	0.3439
1975-07-01	0.5902
1975-10-01	0.6325
1976-01-01	0.6422
1976-04-01	0.7925
1976-07-01	0.8833
1976-10-01	1.0861
1977-01-01	1.1044
1977-04-01	1.3533
1977-07-01	1.5769
1977-10-01	1.7964
1978-01-01	2.1805
1978-04-01	2.3552
1978-07-01	2.5733
1978-10-01	2.8951
1979-01-01	2.9138
1979-04-01	3.0837
1979-07-01	3.3794
1979-10-01	3.3575
1980-01-01	3.0473
1980-04-01	3.4202
1980-07-01	3.3529
1980-10-01	3.2125
1981-01-01	3.1265
1981-04-01	3.0339
1981-07-01	3.0860
1981-10-01	3.5010
1982-01-01	3.7406
1982-04-01	3.7850
1982-07-01	3.7311
1982-10-01	4.4366
1983-01-01	4.6116
1983-04-01	4.4263
1983-07-01	4.3410
1983-10-01	4.2848
1984-01-01	4.4936
1984-04-01	4.3808
1984-07-01	4.2683
1984-10-01	4.7556
1985-01-01	4.8164
1985-04-01	5.1132
1985-07-01	6.2041
1985-10-01	6.4056
1986-01-01	7.2647
1986-04-01	8.1118
1986-07-01	9.4128
1986-10-01	9.7557
1987-01-01	10.7792
1987-04-01	11.1623
1987-07-01	11.0081
1987-10-01	12.2047
1988-01-01	11.4795
1988-04-01	11.6962
1988-07-01	11.3786
1988-10-01	12.2571
1989-01-01	11.3231
1989-04-01	10.6454
1989-07-01	10.8764
1989-10-01	11.1601
1990-01-01	10.8124
1990-04-01	11.2597
1990-07-01	11.7189
1990-10-01	11.5490
1991-01-01	10.9317
1991-04-01	10.7650
1991-07-01	10.9313
1991-10-01	10.6800
1992-01-01	10.5166
1992-04-01	10.2115
1992-07-01	10.4193
1992-10-01	9.5834
1993-01-01	9.1341
1993-04-01	8.8328
1993-07-01	8.7719
1993-10-01	8.4070
1994-01-01	8.3727
1994-04-01	8.8944
1994-07-01	8.4877
1994-10-01	8.4653
1995-01-01	8.3907
1995-04-01	7.9412
1995-07-01	7.7485
1995-10-01	7.6726
1996-01-01	7.7560
1996-04-01	7.1126
1996-07-01	6.8217
1996-10-01	6.4320
1997-01-01	5.7848
1997-04-01	6.0531
1997-07-01	6.2821
1997-10-01	6.3025
1998-01-01	6.8375
1998-04-01	6.7351
1998-07-01	6.7928
1998-10-01	6.6114
1999-01-01	6.8035
1999-04-01	6.3694
1999-07-01	6.6369
1999-10-01	6.5844
2000-01-01	6.3812
2000-04-01	6.6581
2000-07-01	6.3201
2000-10-01	6.0812
2001-01-01	5.8124
2001-04-01	5.9694
2001-07-01	6.0970
2001-10-01	6.3817
2002-01-01	6.3129
2002-04-01	7.2199
2002-07-01	6.9879
2002-10-01	6.9559
2003-01-01	6.7745
2003-04-01	7.3731
2003-07-01	7.4289
2003-10-01	7.8553
2004-01-01	7.9348
2004-04-01	7.9790
2004-07-01	9.9895
2004-10-01	11.1587
2005-01-01	12.7661
2005-04-01	13.4306
2005-07-01	13.4993
2005-10-01	14.6471
2006-01-01	14.2288
2006-04-01	15.0777
2006-07-01	15.2181
2006-10-01	14.2871
2007-01-01	13.7774
2007-04-01	13.2117
2007-07-01	13.3503
2007-10-01	13.4522
2008-01-01	12.9879
2008-04-01	12.3514
2008-07-01	11.7767
2008-10-01	11.0426
2009-01-01	9.6986
2009-04-01	10.2331
2009-07-01	8.5647
2009-10-01	10.1822
2010-01-01	8.8618
2010-04-01	8.5779
2010-07-01	8.9300
2010-10-01	12.3839
2011-01-01	14.5062
2011-04-01	14.9553
2011-07-01	17.2780
2011-10-01	18.1217
2012-01-01	19.7093
2012-04-01	19.3286
2012-07-01	21.1742
2012-10-01	19.9029
2013-01-01	19.7236
2013-04-01	21.5034
2013-07-01	22.2694
2013-10-01	21.6963
2014-01-01	18.6836
2014-04-01	20.0610
2014-07-01	19.7385
2014-10-01	19.5053
2015-01-01	19.3376
2015-04-01	19.3871