Quarter	Billions of US Dollars
1977-04-01	0.0099
1977-07-01	0.0099
1977-10-01	0.0100
1978-01-01	0.0101
1978-04-01	0.0102
1978-07-01	0.0105
1978-10-01	0.0106
1979-01-01	0.0104
1979-04-01	0.0254
1979-07-01	0.0265
1979-10-01	0.0262
1980-01-01	0.0242
1980-04-01	0.0260
1980-07-01	0.0257
1980-10-01	0.0247
1981-01-01	0.0235
1981-04-01	0.0226
1981-07-01	0.0229
1981-10-01	0.0241
1982-01-01	0.0232
1982-04-01	0.0119
1982-07-01	0.0115
1982-10-01	0.0125
1983-01-01	0.0120
1983-04-01	0.0119
1983-07-01	0.0117
1983-10-01	0.0115
1984-01-01	0.0116
1984-04-01	0.0107
1984-07-01	0.0100
1984-10-01	0.2097
1985-01-01	0.2096
1985-04-01	0.2098
1985-07-01	0.2115
1985-10-01	0.2120
1986-01-01	0.2129
1986-04-01	0.2000
1986-07-01	0.2000
1986-10-01	0.2000
1987-01-01	0.2000
1987-04-01	0.2000
1987-07-01	0.2000
2003-10-01	0.2700
2004-01-01	0.2700
2004-04-01	0.2700
2004-07-01	0.2700
2004-10-01	0.4567
2005-01-01	0.4567
2005-04-01	0.4569
2005-07-01	0.4569
2005-10-01	1.1569
2006-01-01	1.1569
2006-04-01	2.1569
2006-07-01	2.6011
2006-10-01	4.1341
2007-01-01	4.7271
2007-04-01	5.4005
2007-07-01	8.1425
2007-10-01	8.1887
2008-01-01	8.2062
2008-04-01	9.5450
2008-07-01	9.3651
2008-10-01	9.2958
2009-01-01	9.3253
2009-04-01	9.4809
2009-07-01	11.4025
2009-10-01	11.3888
2010-01-01	12.0158
2010-04-01	11.9046
2010-07-01	12.0546
2010-10-01	12.3616
2011-01-01	12.4115
2011-04-01	11.4280
2011-07-01	11.2700
2011-10-01	12.2242
2012-01-01	12.2838
2012-04-01	14.0446
2012-07-01	13.0645
2012-10-01	13.0738
2013-01-01	11.6810
2013-04-01	14.3243
2013-07-01	14.3587
2013-10-01	15.6544
2014-01-01	15.6511
2014-04-01	18.0239
2014-07-01	17.7447
2014-10-01	17.7045
2015-01-01	16.2916
2015-04-01	16.3340