Quarter	Billions of US Dollars
1973-04-01	0.00974
1973-07-01	0.00941
1973-10-01	0.00850
1974-01-01	0.00822
1974-04-01	0.00829
1974-07-01	0.00844
1974-10-01	0.00900
1975-01-01	0.00949
1975-04-01	0.00990
1975-07-01	0.00882
1975-10-01	0.00892
1976-01-01	0.00857
1976-04-01	0.00844
1976-07-01	0.01844
1976-10-01	0.01850
1977-01-01	0.01845
1977-04-01	0.01857
1977-07-01	0.01862
1977-10-01	0.01921
1978-01-01	0.01962
1978-04-01	0.01981
1978-07-01	0.02026
1978-10-01	0.02061
1979-01-01	0.02019
1979-04-01	0.02021
1979-07-01	0.02063
1979-10-01	0.02093
1980-01-01	0.01980
1980-04-01	0.02102
1980-07-01	0.02345
1980-10-01	0.02190
1981-01-01	0.02008
1981-04-01	0.01832
1981-07-01	0.01885
1981-10-01	0.01975
1982-01-01	0.01830
1982-04-01	0.01679
1982-07-01	0.01621
1982-10-01	0.01748
1983-01-01	0.01655
1983-04-01	0.01617
1983-07-01	0.01579
1983-10-01	0.01534
1984-01-01	0.01569
1984-04-01	0.01455
1984-07-01	0.01352
1984-10-01	0.01307
1985-01-01	0.01303
1985-04-01	0.01327
1985-07-01	0.01545
1985-10-01	0.01498
1986-01-01	0.01599
1986-04-01	0.01691
1986-07-01	0.01833
1986-10-01	0.01860
1987-01-01	0.02002
1987-04-01	0.01553
1987-07-01	0.01547
1987-10-01	0.01817
1988-01-01	0.01709
1988-04-01	0.01556
1988-07-01	0.01484
1988-10-01	0.01568
1989-01-01	0.00626
1989-04-01	0.00603
1989-07-01	0.00631
1989-10-01	0.00691
1990-01-01	0.00702
1998-01-01	1.27731
1998-04-01	1.27731
1998-07-01	1.27199
1998-10-01	1.27199
1999-01-01	1.26666
1999-04-01	1.26666
1999-07-01	1.26134
1999-10-01	1.26134
2000-01-01	1.25602
2000-04-01	1.25602
2000-07-01	1.25070
2000-10-01	1.25070
2001-01-01	1.24538
2001-04-01	1.24538
2001-07-01	1.24006
2001-10-01	1.24006
2002-01-01	1.23474
2002-04-01	1.23474
2002-07-01	1.22942
2002-10-01	1.22942
2003-01-01	1.22410
2003-04-01	1.22410
2003-07-01	1.21771
2003-10-01	1.21771
2004-01-01	1.21133
2004-04-01	1.21133
2004-07-01	1.20494
2004-10-01	1.20494
2005-01-01	1.19856
2005-04-01	1.19856
2005-07-01	1.19217
2005-10-01	1.19217
2006-01-01	1.18579
2006-04-01	1.18579
2006-07-01	1.17940
2006-10-01	1.17940
2007-01-01	1.17302
2007-04-01	1.17302
2007-07-01	1.16663
2007-10-01	1.16663
2008-01-01	1.15812
2008-04-01	1.15812
2008-07-01	1.14960
2008-10-01	1.14960
2009-01-01	1.14109
2009-04-01	1.14109
2009-07-01	1.13258
2009-10-01	1.13258
2010-01-01	1.12406
2010-04-01	2.60514
2010-07-01	2.59237
2010-10-01	2.59237
2011-01-01	2.57960
2011-04-01	2.57960
2011-07-01	2.56683
2011-10-01	2.56683
2012-01-01	2.55406
2012-04-01	2.55406
2012-07-01	2.53703
2012-10-01	2.53703
2013-01-01	2.52000
2013-04-01	2.52000
2013-07-01	2.50297
2013-10-01	2.50297
2014-01-01	2.48594
2014-04-01	2.48594
2014-07-01	3.21892
2014-10-01	3.21892
2015-01-01	4.20189
2015-04-01	4.20189