Quarter	Billions of US Dollars
1970-10-01	0.015
1971-01-01	0.025
1971-10-01	0.125
1972-01-01	0.095
1972-04-01	0.143
1972-07-01	0.172
1972-10-01	0.165
1973-01-01	0.463
1973-04-01	0.244
1973-07-01	0.347
1973-10-01	0.095
1974-01-01	0.087
1974-04-01	0.064
1974-07-01	0.115
1974-10-01	0.020
1975-04-01	0.216
1975-07-01	0.110
1975-10-01	0.060
1976-01-01	0.350
1976-04-01	0.322
1976-07-01	0.100
1976-10-01	0.210
1977-01-01	0.188
1977-04-01	0.275
1977-07-01	0.164
1977-10-01	0.228
1978-01-01	0.511
1978-04-01	0.414
1978-07-01	0.170
1978-10-01	0.040
1979-01-01	0.218
1979-04-01	0.198
1979-07-01	0.102
1979-10-01	0.155
1980-04-01	0.125
1981-01-01	0.075
1982-04-01	0.075
1982-10-01	0.100
1983-04-01	0.006
1983-07-01	0.015
1983-10-01	0.005
1984-01-01	0.093
1984-04-01	0.065
1984-07-01	0.100
1984-10-01	0.488
1985-01-01	0.162
1985-04-01	0.294
1985-07-01	3.455
1985-10-01	2.181
1986-01-01	0.841
1986-04-01	1.274
1986-07-01	1.163
1986-10-01	1.271
1987-01-01	1.360
1987-04-01	1.115
1987-07-01	0.788
1987-10-01	0.742
1988-01-01	2.628
1988-04-01	3.265
1988-07-01	3.542
1988-10-01	3.003
1989-01-01	2.066
1989-04-01	2.333
1989-07-01	5.361
1989-10-01	5.320
1990-01-01	6.213
1990-04-01	5.798
1990-07-01	5.673
1990-10-01	6.254
1991-01-01	9.605
1991-04-01	7.967
1991-07-01	6.694
1991-10-01	5.052
1992-01-01	5.801
1992-04-01	6.351
1992-07-01	2.355
1992-10-01	11.001
1993-01-01	8.411
1993-04-01	9.031
1993-07-01	10.485
1993-10-01	9.419
1994-01-01	16.248
1994-04-01	9.746
1994-07-01	11.566
1994-10-01	9.285
1995-01-01	9.770
1995-04-01	12.096
1995-07-01	13.614
1995-10-01	13.198
1996-01-01	22.208
1996-04-01	18.163
1996-07-01	18.877
1996-10-01	25.631
1997-01-01	27.008
1997-04-01	25.140
1997-07-01	23.710
1997-10-01	24.127
1998-01-01	36.478
1998-04-01	26.065
1998-07-01	26.529
1998-10-01	22.585
1999-01-01	51.519
1999-04-01	55.723
1999-07-01	43.244
1999-10-01	36.953
2000-01-01	55.339
2000-04-01	50.092
2000-07-01	39.280
2000-10-01	44.064
2001-01-01	52.986
2001-04-01	56.485
2001-07-01	39.055
2001-10-01	46.795
2002-01-01	47.970
2002-04-01	61.059
2002-07-01	41.075
2002-10-01	59.684
2003-01-01	80.271
2003-04-01	85.937
2003-07-01	91.116
2003-10-01	93.357
2004-01-01	139.899
2004-04-01	94.160
2004-07-01	116.212
2004-10-01	136.403
2005-01-01	133.171
2005-04-01	127.162
2005-07-01	126.481
2005-10-01	154.298
2006-01-01	148.623
2006-04-01	137.598
2006-07-01	160.813
2006-10-01	220.700
2007-01-01	236.254
2007-04-01	250.599
2007-07-01	161.728
2007-10-01	158.204
2008-01-01	118.513
2008-04-01	316.192
2008-07-01	291.055
2008-10-01	392.117
2009-01-01	184.942
2009-04-01	177.917
2009-07-01	160.307
2009-10-01	141.161
2010-01-01	134.291
2010-04-01	98.170
2010-07-01	130.658
2010-10-01	109.491
2011-01-01	143.722
2011-04-01	156.667
2011-07-01	78.087
2011-10-01	145.893
2012-01-01	198.561
2012-04-01	124.266
2012-07-01	79.704
2012-10-01	68.110
2013-01-01	76.962
2013-04-01	81.216
2013-07-01	74.336
2013-10-01	91.392
2014-01-01	97.762
2014-04-01	133.764
2014-07-01	124.172
2014-10-01	84.480
2015-01-01	131.515
2015-04-01	105.313