Quarter	Billions of US Dollars
1977-04-01	0.00992
1977-07-01	0.00993
1977-10-01	0.00999
1978-01-01	0.01013
1978-04-01	0.01016
1978-07-01	0.01053
1978-10-01	0.01056
1979-01-01	0.01043
1979-04-01	0.01037
1979-07-01	0.01043
1979-10-01	0.01040
1980-01-01	0.01053
1980-04-01	0.01053
1980-07-01	0.01056
1980-10-01	0.01053
1981-01-01	0.01046
1981-04-01	0.01028
1981-07-01	0.01025
1981-10-01	0.01025
1982-01-01	0.01025
1984-10-01	0.20000
1985-01-01	0.20000
1985-04-01	0.20000
1985-07-01	0.20000
1985-10-01	0.20000
1986-01-01	0.20000
1986-04-01	0.20000
1986-07-01	0.20000
1986-10-01	0.20000
1987-01-01	0.20000
1987-04-01	0.20000
1987-07-01	0.20000
2004-10-01	0.18667
2005-01-01	0.78667
2005-04-01	0.78692
2005-07-01	0.78692
2005-10-01	1.48692
2006-01-01	1.48692
2006-04-01	2.90009
2006-07-01	3.32460
2006-10-01	3.88633
2007-01-01	3.87307
2007-04-01	3.88853
2007-07-01	3.92690
2007-10-01	3.95005
2008-01-01	3.92123
2008-04-01	5.26200
2008-07-01	5.14427
2008-10-01	5.09138
2009-01-01	5.14675
2009-04-01	5.26724
2009-07-01	7.16662
2009-10-01	7.36305
2010-01-01	7.57939
2010-04-01	7.51958
2010-07-01	7.61106
2010-10-01	7.53018
2011-01-01	7.54416
2011-04-01	6.08048
2011-07-01	5.99371
2011-10-01	6.99023
2012-01-01	7.01861
2012-04-01	8.73685
2012-07-01	8.73118
2012-10-01	8.72070
2013-01-01	7.35706
2013-04-01	9.32080
2013-07-01	9.32231
2013-10-01	9.20651
2014-01-01	9.20347
2014-04-01	9.83602
2014-07-01	9.81302
2014-10-01	9.80594
2015-01-01	8.94666
2015-04-01	8.94617