Quarter	Billions of US Dollars
1971-10-01	0.0306
1972-01-01	0.0815
1972-04-01	0.0400
1972-07-01	0.0200
1972-10-01	0.0350
1973-01-01	0.0613
1973-07-01	0.0507
1973-10-01	0.0657
1974-10-01	0.0500
1975-01-01	0.0950
1975-04-01	0.0772
1975-07-01	0.0240
1975-10-01	0.0618
1976-01-01	0.0617
1976-04-01	0.1431
1976-07-01	0.0906
1976-10-01	0.0811
1977-01-01	0.1205
1977-04-01	0.3059
1977-07-01	0.4696
1977-10-01	0.4918
1978-01-01	0.4633
1978-04-01	0.1242
1978-07-01	0.1000
1978-10-01	0.1000
1979-07-01	0.1730
1979-10-01	0.0250
1980-01-01	0.0562
1980-04-01	0.1610
1980-10-01	0.0900
1981-01-01	0.2250
1981-04-01	0.5688
1981-07-01	0.4653
1981-10-01	0.5500
1982-01-01	0.6425
1982-04-01	0.2101
1982-07-01	0.2444
1985-10-01	0.0486
1986-04-01	0.0500
1989-04-01	0.1000
1989-10-01	0.1500
1990-01-01	36.0136
1990-04-01	0.3936
1990-07-01	0.5452
1990-10-01	0.3500
1991-01-01	1.3071
1991-04-01	1.0500
1991-07-01	0.4801
1991-10-01	0.5193
1992-01-01	0.4730
1992-04-01	0.4994
1992-07-01	0.4000
1992-10-01	1.9683
1993-01-01	1.1881
1993-04-01	2.1213
1993-07-01	1.2894
1993-10-01	1.8369
1994-01-01	4.5062
1994-04-01	1.5873
1994-07-01	1.0890
1994-10-01	0.6526
1995-01-01	0.1025
1995-04-01	1.3455
1995-07-01	2.5693
1995-10-01	1.2699
1996-01-01	4.1650
1996-04-01	4.7380
1996-07-01	8.9049
1996-10-01	1.2220
1997-01-01	4.0148
1997-04-01	5.2122
1997-07-01	3.3816
1997-10-01	1.4717
1998-01-01	2.8155
1998-04-01	1.0217
1998-07-01	2.2972
1998-10-01	2.5516
1999-01-01	3.5000
1999-04-01	3.8353
1999-07-01	2.1969
1999-10-01	2.6213
2000-01-01	6.1743
2000-04-01	0.9540
2000-07-01	3.1286
2000-10-01	0.5171
2001-01-01	7.7182
2001-04-01	1.5084
2001-07-01	2.9000
2001-10-01	1.8564
2002-01-01	3.9500
2002-04-01	0.2085
2002-07-01	1.8754
2002-10-01	2.1450
2003-01-01	4.9452
2003-04-01	4.1512
2003-07-01	1.9107
2003-10-01	4.5601
2004-01-01	4.1697
2004-04-01	4.7633
2004-07-01	5.1379
2004-10-01	1.9414
2005-01-01	5.6948
2005-04-01	1.9659
2005-07-01	1.5865
2005-10-01	1.1471
2006-01-01	3.4763
2006-04-01	0.7695
2006-07-01	0.1574
2006-10-01	3.4402
2007-01-01	4.1276
2007-04-01	1.9079
2007-07-01	1.9480
2007-10-01	2.7909
2008-01-01	1.5713
2008-04-01	2.5493
2008-07-01	0.3350
2008-10-01	2.1269
2009-01-01	3.7000
2009-04-01	0.6833
2009-07-01	5.0031
2009-10-01	8.6543
2010-01-01	9.8594
2010-04-01	7.8993
2010-07-01	5.8575
2010-10-01	3.3069
2011-01-01	5.0628
2011-04-01	4.5680
2011-07-01	6.1320
2011-10-01	4.8504
2012-01-01	11.2503
2012-04-01	3.6696
2012-07-01	7.3662
2012-10-01	7.9609
2013-01-01	5.7008
2013-04-01	4.6328
2013-07-01	21.3766
2013-10-01	7.3023
2014-01-01	14.5825
2014-04-01	11.6155
2014-07-01	5.7935
2014-10-01	8.0127
2015-01-01	16.0043
2015-04-01	12.2263