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	4.5537
1983-04-01	4.3684
1983-07-01	4.2831
1983-10-01	4.2270
1984-01-01	4.4356
1984-04-01	4.3231
1984-07-01	4.2125
1984-10-01	4.7499
1985-01-01	4.8454
1985-04-01	5.1560
1985-07-01	6.4732
1985-10-01	6.8056
1986-01-01	7.7339
1986-04-01	8.6657
1986-07-01	10.1992
1986-10-01	10.7893
1987-01-01	12.1201
1987-04-01	12.7725
1987-07-01	12.9938
1987-10-01	14.9081
1988-01-01	14.2178
1988-04-01	14.3557
1988-07-01	13.9030
1988-10-01	14.8801
1989-01-01	13.8963
1989-04-01	13.1346
1989-07-01	13.4789
1989-10-01	13.6866
1990-01-01	13.3709
1990-04-01	13.9016
1990-07-01	14.5178
1990-10-01	14.3908
1991-01-01	13.5630
1991-04-01	13.2168
1991-07-01	13.5262
1991-10-01	13.0573
1992-01-01	12.5729
1992-04-01	12.0618
1992-07-01	12.0630
1992-10-01	10.9548
1993-01-01	10.3965
1993-04-01	10.0808
1993-07-01	10.0838
1993-10-01	9.4935
1994-01-01	9.5601
1994-04-01	9.8482
1994-07-01	9.3527
1994-10-01	9.4890
1995-01-01	9.3461
1995-04-01	9.0659
1995-07-01	8.5110
1995-10-01	8.5841
1996-01-01	8.5001
1996-04-01	8.2861
1996-07-01	7.8768
1996-10-01	7.4539
1997-01-01	6.8557
1997-04-01	7.0020
1997-07-01	7.1592
1997-10-01	7.0230
1998-01-01	7.5724
1998-04-01	7.4520
1998-07-01	7.4896
1998-10-01	7.1408
1999-01-01	7.3290
1999-04-01	6.9272
1999-07-01	6.8994
1999-10-01	6.8391
2000-01-01	6.5990
2000-04-01	7.1474
2000-07-01	6.6985
2000-10-01	6.5132
2001-01-01	6.2323
2001-04-01	6.4305
2001-07-01	6.5838
2001-10-01	6.7609
2002-01-01	6.7068
2002-04-01	7.8665
2002-07-01	7.5712
2002-10-01	7.7693
2003-01-01	7.8720
2003-04-01	8.1871
2003-07-01	8.2004
2003-10-01	8.4514
2004-01-01	8.1553
2004-04-01	7.8519
2004-07-01	7.8804
2004-10-01	7.8109
2005-01-01	7.5365
2005-04-01	6.8483
2005-07-01	6.8102
2005-10-01	6.3877
2006-01-01	6.0704
2006-04-01	6.4043
2006-07-01	6.4062
2006-10-01	6.7225
2007-01-01	6.4850
2007-04-01	7.6117
2007-07-01	7.6215
2007-10-01	8.7446
2008-01-01	8.5223
2008-04-01	8.2992
2008-07-01	7.9229
2008-10-01	7.5628
2009-01-01	7.2584
2009-04-01	7.5770
2009-07-01	7.7251
2009-10-01	9.6888
2010-01-01	9.5611
2010-04-01	9.9494
2010-07-01	10.5699
2010-10-01	13.9406
2011-01-01	16.0655
2011-04-01	16.0970
2011-07-01	18.4140
2011-10-01	19.2838
2012-01-01	21.0286
2012-04-01	20.5843
2012-07-01	22.2535
2012-10-01	22.2139
2013-01-01	22.1251
2013-04-01	22.0107
2013-07-01	22.7033
2013-10-01	22.7762
2014-01-01	18.7808
2014-04-01	19.9390
2014-07-01	19.6946
2014-10-01	19.5658
2015-01-01	19.3756
2015-04-01	19.5759