Quarter	Billions of US Dollars
1976-01-01	0.0171
1976-04-01	0.0372
1976-07-01	0.0374
1976-10-01	0.0375
1977-01-01	0.0379
1977-04-01	0.0379
1977-07-01	0.0380
1977-10-01	0.0384
1978-01-01	0.0388
1978-04-01	0.0688
1978-07-01	0.0691
1978-10-01	0.0692
1979-01-01	0.0690
1979-04-01	0.0692
1979-07-01	0.0692
1979-10-01	0.0696
1980-01-01	0.0695
1980-04-01	0.0953
1980-07-01	0.0954
1980-10-01	0.0952
1981-01-01	0.0768
1981-04-01	0.0768
1981-07-01	0.0768
1981-10-01	0.0768
1982-01-01	0.0768
1982-04-01	0.0768
1982-07-01	0.0768
1982-10-01	0.0768
1983-01-01	0.0768
1983-04-01	0.0550
1983-07-01	0.0550
1983-10-01	0.0550
1984-01-01	0.0550
1984-04-01	0.0550
1984-07-01	0.0550
1984-10-01	0.0550
1985-01-01	0.0550
1985-04-01	0.0250
1985-07-01	0.0250
1985-10-01	0.0170
1986-01-01	0.0170
1986-04-01	0.0170
1986-07-01	0.0170
1986-10-01	0.0090
1987-01-01	0.0090
1996-04-01	0.2199
1996-07-01	0.5449
1996-10-01	0.4099
1997-01-01	0.4099
1997-04-01	0.6352
1997-07-01	0.6324
1997-10-01	0.6250
1998-01-01	0.6184
1998-04-01	1.1669
1998-07-01	1.2222
1998-10-01	1.2162
1999-01-01	1.5802
1999-04-01	1.5304
1999-07-01	1.5677
1999-10-01	1.4952
2000-01-01	1.8229
2000-04-01	1.8193
2000-07-01	1.7003
2000-10-01	1.7775
2001-01-01	1.7947
2001-04-01	2.1157
2001-07-01	1.9245
2001-10-01	1.8551
2002-01-01	1.8368
2002-04-01	2.0898
2002-07-01	2.0662
2002-10-01	2.2224
2003-01-01	2.3075
2003-04-01	2.4143
2003-07-01	2.4612
2003-10-01	2.6610
2004-01-01	2.5764
2004-04-01	2.3094
2004-07-01	2.3571
2004-10-01	2.6491
2005-01-01	2.5223
2005-04-01	1.7453
2005-07-01	1.7382
2005-10-01	1.6991
2006-01-01	1.7430
2006-04-01	1.8260
2006-07-01	1.8185
2006-10-01	1.8833
2007-01-01	3.3961
2007-04-01	3.4438
2007-07-01	3.6156
2007-10-01	3.9011
2008-01-01	5.7714
2008-04-01	5.7539
2008-07-01	5.2206
2008-10-01	5.0797
2009-01-01	4.3251
2009-04-01	4.5935
2009-07-01	7.6876
2009-10-01	7.8801
2010-01-01	6.6991
2010-04-01	7.2644
2010-07-01	8.0796
2010-10-01	7.9771
2011-01-01	8.9788
2011-04-01	8.4839
2011-07-01	7.9263
2011-10-01	7.5952
2012-01-01	7.8400
2012-04-01	7.3903
2012-07-01	5.0039
2012-10-01	7.3561
2013-01-01	7.4616
2013-04-01	11.0736
2013-07-01	11.1274
2013-10-01	11.2413
2014-01-01	14.7401
2014-04-01	17.9141
2014-07-01	17.9872
2014-10-01	17.6196
2015-01-01	16.6669
2015-04-01	15.5087