Quarter	Billions of US Dollars
1968-07-01	0.0400
1968-10-01	0.0400
1969-01-01	0.0400
1969-04-01	0.0400
1969-07-01	0.0400
1969-10-01	0.0400
1970-01-01	0.0400
1970-04-01	0.0400
1970-07-01	0.0400
1970-10-01	0.0400
1971-01-01	0.0400
1971-04-01	0.0400
1971-07-01	0.0400
1971-10-01	0.0400
1972-01-01	0.0400
1972-04-01	0.0400
1972-07-01	0.0400
1972-10-01	0.0400
1973-01-01	0.0400
1973-04-01	0.0400
1973-07-01	0.0400
1973-10-01	0.0425
1974-01-01	0.0927
1974-04-01	0.0927
1974-07-01	0.0927
1974-10-01	0.0931
1975-01-01	0.1129
1975-04-01	0.1131
1975-07-01	0.1111
1975-10-01	0.1121
1976-01-01	0.1129
1976-04-01	0.1135
1976-07-01	0.1136
1976-10-01	0.1137
1977-01-01	0.1128
1977-04-01	0.1136
1977-07-01	0.1160
1977-10-01	0.1190
1978-01-01	0.1210
1978-04-01	0.1212
1978-07-01	0.1276
1978-10-01	0.1258
1979-01-01	0.1243
1979-04-01	0.1249
1979-07-01	0.1273
1979-10-01	0.1267
1980-01-01	0.1217
1980-04-01	0.1558
1980-07-01	0.1551
1980-10-01	0.1529
1981-01-01	0.1503
1981-04-01	0.1686
1981-07-01	0.1694
1981-10-01	0.3089
1982-01-01	0.3048
1982-04-01	0.3320
1982-07-01	0.3299
1982-10-01	0.3330
1983-01-01	0.3306
1983-04-01	0.3300
1983-07-01	0.3305
1983-10-01	0.3292
1984-01-01	0.3295
1984-04-01	0.3279
1984-07-01	0.3443
1984-10-01	0.3806
1985-01-01	0.5304
1985-04-01	0.6103
1985-07-01	0.6636
1985-10-01	0.8708
1986-01-01	1.2191
1986-04-01	1.2680
1986-07-01	1.3246
1986-10-01	1.3612
1987-01-01	1.8506
1987-04-01	1.8341
1987-07-01	1.8898
1987-10-01	2.2540
1988-01-01	2.2577
1988-04-01	2.3073
1988-07-01	2.5770
1988-10-01	2.7173
1989-01-01	2.5784
1989-04-01	2.7228
1989-07-01	2.8030
1989-10-01	3.2115
1990-01-01	3.2427
1990-04-01	3.3346
1990-07-01	3.7089
1990-10-01	4.0915
1991-01-01	4.0884
1991-04-01	4.0443
1991-07-01	4.8134
1991-10-01	5.3230
1992-01-01	4.6564
1992-04-01	5.2376
1992-07-01	5.5040
1992-10-01	4.8648
1993-01-01	4.6375
1993-04-01	4.5770
1993-07-01	5.3877
1993-10-01	5.4998
1994-01-01	5.7171
1994-04-01	6.1208
1994-07-01	6.5429
1994-10-01	6.0832
1995-01-01	6.4021
1995-04-01	6.3631
1995-07-01	6.3426
1995-10-01	6.2953
1996-01-01	6.5472
1996-04-01	6.5595
1996-07-01	6.8962
1996-10-01	7.0877
1997-01-01	7.2439
1997-04-01	7.7400
1997-07-01	8.5757
1997-10-01	8.6004
1998-01-01	8.9219
1998-04-01	9.0905
1998-07-01	8.9595
1998-10-01	9.0580
1999-01-01	9.0182
1999-04-01	8.5798
1999-07-01	8.5058
1999-10-01	8.0915
2000-01-01	8.3243
2000-04-01	8.1763
2000-07-01	7.5482
2000-10-01	7.5654
2001-01-01	7.3215
2001-04-01	7.0698
2001-07-01	6.9631
2001-10-01	6.9463
2002-01-01	7.0446
2002-04-01	7.2652
2002-07-01	6.8805
2002-10-01	6.4230
2003-01-01	6.2083
2003-04-01	6.2590
2003-07-01	6.3816
2003-10-01	6.5660
2004-01-01	7.3681
2004-04-01	7.8561
2004-07-01	9.1776
2004-10-01	11.2568
2005-01-01	13.5746
2005-04-01	13.9339
2005-07-01	15.1097
2005-10-01	16.6351
2006-01-01	20.1597
2006-04-01	22.5421
2006-07-01	23.7061
2006-10-01	26.1818
2007-01-01	32.4998
2007-04-01	36.1376
2007-07-01	36.8374
2007-10-01	40.1725
2008-01-01	40.9444
2008-04-01	41.0738
2008-07-01	41.9983
2008-10-01	42.6581
2009-01-01	40.6789
2009-04-01	41.3728
2009-07-01	41.7938
2009-10-01	44.7917
2010-01-01	43.6838
2010-04-01	43.1991
2010-07-01	43.0965
2010-10-01	45.7312
2011-01-01	47.6068
2011-04-01	52.8346
2011-07-01	54.2081
2011-10-01	51.6918
2012-01-01	53.8602
2012-04-01	51.9151
2012-07-01	53.2585
2012-10-01	54.9989
2013-01-01	58.5355
2013-04-01	66.5520
2013-07-01	68.4114
2013-10-01	71.9146
2014-01-01	74.6738
2014-04-01	79.7595
2014-07-01	86.3009
2014-10-01	87.0217
2015-01-01	87.1926
2015-04-01	91.0156