Quarter	Billions of US Dollars
1974-10-01	0.019
1975-01-01	0.019
1975-04-01	0.019
1975-07-01	0.019
1975-10-01	0.019
1976-01-01	0.019
1976-04-01	0.029
1976-07-01	0.053
1976-10-01	0.093
1977-01-01	0.119
1977-04-01	0.119
1977-07-01	0.119
1977-10-01	0.167
1978-01-01	0.215
1978-04-01	0.232
1978-07-01	0.240
1978-10-01	0.242
1979-01-01	0.280
1979-04-01	0.279
1979-07-01	0.256
1979-10-01	0.254
1980-01-01	0.246
1980-04-01	0.259
1980-07-01	0.259
1980-10-01	0.306
1981-01-01	0.298
1981-04-01	0.284
1981-07-01	0.356
1981-10-01	0.323
1982-01-01	0.321
1982-04-01	0.315
1982-07-01	0.304
1982-10-01	0.329
1983-01-01	0.324
1983-04-01	0.328
1983-07-01	0.401
1983-10-01	0.475
1984-01-01	0.530
1984-04-01	0.625
1984-07-01	0.799
1984-10-01	1.139
1985-01-01	1.244
1985-04-01	1.687
1985-07-01	2.179
1985-10-01	2.725
1986-01-01	3.242
1986-04-01	3.598
1986-07-01	3.761
1986-10-01	3.845
1987-01-01	4.077
1987-04-01	4.080
1987-07-01	4.293
1987-10-01	4.811
1988-01-01	4.314
1988-04-01	4.082
1988-07-01	4.105
1988-10-01	4.345
1989-01-01	4.083
1989-04-01	3.802
1989-07-01	3.853
1989-10-01	3.998
1990-01-01	4.089
1990-04-01	3.933
1990-07-01	4.226
1990-10-01	4.160
1991-01-01	4.635
1991-04-01	5.927
1991-07-01	6.336
1991-10-01	7.056
1992-01-01	7.539
1992-04-01	8.000
1992-07-01	9.316
1992-10-01	9.937
1993-01-01	10.768
1993-04-01	11.805
1993-07-01	12.531
1993-10-01	14.772
1994-01-01	15.912
1994-04-01	17.623
1994-07-01	19.081
1994-10-01	19.273
1995-01-01	21.644
1995-04-01	24.082
1995-07-01	24.357
1995-10-01	24.884
1996-01-01	26.970
1996-04-01	30.140
1996-07-01	33.785
1996-10-01	37.398
1997-01-01	39.896
1997-04-01	43.451
1997-07-01	47.947
1997-10-01	49.090
1998-01-01	48.033
1998-04-01	51.171
1998-07-01	50.930
1998-10-01	51.530
1999-01-01	49.872
1999-04-01	48.586
1999-07-01	48.081
1999-10-01	48.411
2000-01-01	49.335
2000-04-01	48.805
2000-07-01	47.983
2000-10-01	47.577
2001-01-01	46.377
2001-04-01	45.672
2001-07-01	45.334
2001-10-01	45.897
2002-01-01	44.249
2002-04-01	46.233
2002-07-01	48.761
2002-10-01	51.540
2003-01-01	51.934
2003-04-01	54.714
2003-07-01	58.431
2003-10-01	59.561
2004-01-01	62.869
2004-04-01	65.743
2004-07-01	67.423
2004-10-01	69.051
2005-01-01	71.197
2005-04-01	72.030
2005-07-01	73.217
2005-10-01	77.901
2006-01-01	79.638
2006-04-01	84.236
2006-07-01	87.970
2006-10-01	91.465
2007-01-01	92.177
2007-04-01	100.375
2007-07-01	100.927
2007-10-01	103.110
2008-01-01	106.580
2008-04-01	107.840
2008-07-01	104.346
2008-10-01	102.401
2009-01-01	103.308
2009-04-01	113.487
2009-07-01	120.278
2009-10-01	117.442
2010-01-01	117.418
2010-04-01	118.046
2010-07-01	124.352
2010-10-01	128.892
2011-01-01	134.731
2011-04-01	138.560
2011-07-01	141.325
2011-10-01	144.838
2012-01-01	150.710
2012-04-01	151.850
2012-07-01	160.857
2012-10-01	157.805
2013-01-01	160.218
2013-04-01	153.712
2013-07-01	165.698
2013-10-01	173.099
2014-01-01	177.115
2014-04-01	176.726
2014-07-01	172.848
2014-10-01	176.683
2015-01-01	172.451
2015-04-01	175.555