Quarter	Billions of US Dollars
1966-07-01	0.0150
1967-01-01	0.0138
1972-04-01	0.0325
1972-07-01	0.0345
1972-10-01	0.0516
1973-01-01	0.0266
1973-04-01	0.0600
1973-07-01	0.0429
1973-10-01	0.0435
1974-01-01	0.0518
1974-04-01	0.1127
1974-07-01	0.1361
1974-10-01	0.2806
1975-01-01	0.3992
1975-04-01	0.5238
1975-07-01	0.1082
1975-10-01	0.0189
1976-01-01	0.0749
1976-04-01	0.1044
1976-07-01	0.1446
1976-10-01	0.3270
1977-01-01	0.3424
1977-04-01	0.3333
1977-07-01	0.4066
1977-10-01	0.3416
1978-01-01	0.2926
1978-04-01	0.3596
1978-07-01	0.3666
1978-10-01	0.3337
1979-01-01	0.3560
1979-04-01	0.3196
1979-07-01	0.3907
1979-10-01	0.3182
1980-01-01	0.3573
1980-04-01	0.5255
1980-07-01	0.5052
1980-10-01	0.3571
1981-01-01	0.3324
1981-04-01	0.4192
1981-07-01	0.3093
1981-10-01	0.4769
1982-01-01	0.6402
1982-04-01	0.4120
1982-07-01	0.3849
1982-10-01	0.1447
1983-01-01	0.6092
1983-04-01	0.4443
1983-07-01	0.1661
1983-10-01	0.2363
1984-01-01	0.7609
1984-04-01	0.6672
1984-07-01	0.3360
1984-10-01	0.4488
1985-01-01	0.5933
1985-04-01	0.6565
1985-07-01	0.5280
1985-10-01	0.3996
1986-01-01	1.2518
1986-04-01	0.8896
1986-07-01	1.0636
1986-10-01	0.6435
1987-01-01	1.8952
1987-04-01	0.9095
1987-07-01	0.9483
1987-10-01	1.3104
1988-01-01	3.1696
1988-04-01	1.5335
1988-07-01	0.8587
1988-10-01	0.9143
1989-01-01	1.9208
1989-04-01	0.9455
1989-07-01	0.7969
1989-10-01	1.2363
1990-01-01	1.5467
1990-04-01	1.3311
1990-07-01	0.7522
1990-10-01	0.8000
1991-01-01	2.0579
1991-04-01	0.9992
1991-07-01	1.1234
1991-10-01	1.0101
1992-01-01	2.4991
1992-04-01	2.3075
1992-07-01	1.3218
1992-10-01	1.9173
1993-01-01	2.2095
1993-04-01	2.3181
1993-07-01	2.6548
1993-10-01	3.5568
1994-01-01	2.4650
1994-04-01	1.7336
1994-07-01	0.9311
1994-10-01	4.2678
1995-01-01	4.3078
1995-04-01	2.5360
1995-07-01	1.7096
1995-10-01	1.6721
1996-01-01	5.9713
1996-04-01	1.2982
1996-07-01	2.3335
1996-10-01	2.6101
1997-01-01	4.0754
1997-04-01	1.6540
1997-07-01	2.0824
1997-10-01	1.5049
1998-01-01	5.8552
1998-04-01	1.9197
1998-07-01	2.1017
1998-10-01	4.1984
1999-01-01	7.5905
1999-04-01	5.6844
1999-07-01	3.9244
1999-10-01	2.2374
2000-01-01	7.6776
2000-04-01	5.0912
2000-07-01	4.9001
2000-10-01	2.0226
2001-01-01	10.1188
2001-04-01	3.0557
2001-07-01	3.5932
2001-10-01	9.2380
2002-01-01	11.8378
2002-04-01	6.7540
2002-07-01	2.3615
2002-10-01	4.0106
2003-01-01	8.9866
2003-04-01	13.9692
2003-07-01	7.2070
2003-10-01	7.3406
2004-01-01	13.8582
2004-04-01	7.7867
2004-07-01	4.1153
2004-10-01	6.5778
2005-01-01	21.6839
2005-04-01	16.4791
2005-07-01	6.7604
2005-10-01	9.6946
2006-01-01	17.5777
2006-04-01	13.5557
2006-07-01	10.7231
2006-10-01	17.5499
2007-01-01	31.2011
2007-04-01	10.9534
2007-07-01	11.2863
2007-10-01	14.1077
2008-01-01	17.2509
2008-04-01	11.2796
2008-07-01	6.5845
2008-10-01	10.7396
2009-01-01	21.2048
2009-04-01	18.7385
2009-07-01	11.5297
2009-10-01	4.1227
2010-01-01	12.9552
2010-04-01	3.9069
2010-07-01	5.6608
2010-10-01	4.5115
2011-01-01	17.8241
2011-04-01	10.8591
2011-07-01	4.3674
2011-10-01	7.0391
2012-01-01	8.8090
2012-04-01	14.9826
2012-07-01	7.7038
2012-10-01	7.7009
2013-01-01	5.4932
2013-04-01	19.8761
2013-07-01	10.2681
2013-10-01	13.0086
2014-01-01	5.3939
2014-04-01	12.2050
2014-07-01	9.9148
2014-10-01	5.8816
2015-01-01	7.0185
2015-04-01	1.9451