Quarter	Billions of US Dollars
1969-01-01	0.025
1969-04-01	0.025
1969-07-01	0.026
1969-10-01	0.077
1970-01-01	0.077
1970-04-01	0.078
1970-07-01	0.153
1970-10-01	0.152
1971-01-01	0.228
1971-04-01	0.231
1971-07-01	0.287
1971-10-01	0.374
1972-01-01	0.533
1972-04-01	1.131
1972-07-01	1.325
1972-10-01	1.824
1973-01-01	2.012
1973-04-01	2.478
1973-07-01	2.692
1973-10-01	3.125
1974-01-01	3.646
1974-04-01	4.231
1974-07-01	4.647
1974-10-01	5.346
1975-01-01	6.102
1975-04-01	6.996
1975-07-01	7.907
1975-10-01	10.191
1976-01-01	13.536
1976-04-01	15.184
1976-07-01	17.014
1976-10-01	19.161
1977-01-01	20.214
1977-04-01	21.558
1977-07-01	23.224
1977-10-01	24.514
1978-01-01	26.058
1978-04-01	27.816
1978-07-01	29.037
1978-10-01	29.951
1979-01-01	31.606
1979-04-01	32.354
1979-07-01	33.442
1979-10-01	33.761
1980-01-01	33.665
1980-04-01	35.704
1980-07-01	35.260
1980-10-01	35.615
1981-01-01	36.087
1981-04-01	37.889
1981-07-01	40.362
1981-10-01	44.338
1982-01-01	47.083
1982-04-01	48.750
1982-07-01	51.564
1982-10-01	53.298
1983-01-01	54.142
1983-04-01	56.076
1983-07-01	56.188
1983-10-01	57.063
1984-01-01	58.639
1984-04-01	59.142
1984-07-01	59.799
1984-10-01	60.582
1985-01-01	61.719
1985-04-01	63.201
1985-07-01	66.295
1985-10-01	67.405
1986-01-01	71.918
1986-04-01	76.201
1986-07-01	80.831
1986-10-01	83.649
1987-01-01	86.170
1987-04-01	86.858
1987-07-01	87.291
1987-10-01	92.391
1988-01-01	91.468
1988-04-01	91.557
1988-07-01	93.034
1988-10-01	97.368
1989-01-01	98.849
1989-04-01	97.999
1989-07-01	99.332
1989-10-01	101.275
1990-01-01	102.520
1990-04-01	105.299
1990-07-01	107.151
1990-10-01	109.623
1991-01-01	111.366
1991-04-01	115.234
1991-07-01	118.607
1991-10-01	124.287
1992-01-01	122.344
1992-04-01	128.422
1992-07-01	131.949
1992-10-01	130.113
1993-01-01	141.102
1993-04-01	144.707
1993-07-01	148.640
1993-10-01	147.345
1994-01-01	154.240
1994-04-01	158.364
1994-07-01	166.792
1994-10-01	164.054
1995-01-01	169.733
1995-04-01	172.723
1995-07-01	177.668
1995-10-01	175.390
1996-01-01	175.421
1996-04-01	174.930
1996-07-01	177.598
1996-10-01	179.807
1997-01-01	180.407
1997-04-01	184.630
1997-07-01	186.784
1997-10-01	181.501
1998-01-01	186.098
1998-04-01	189.756
1998-07-01	194.076
1998-10-01	199.434
1999-01-01	197.718
1999-04-01	202.499
1999-07-01	207.770
1999-10-01	209.362
2000-01-01	207.559
2000-04-01	203.477
2000-07-01	200.381
2000-10-01	200.063
2001-01-01	200.631
2001-04-01	205.554
2001-07-01	210.305
2001-10-01	215.366
2002-01-01	221.702
2002-04-01	231.664
2002-07-01	235.479
2002-10-01	239.427
2003-01-01	242.069
2003-04-01	257.138
2003-07-01	264.092
2003-10-01	281.381
2004-01-01	280.017
2004-04-01	275.659
2004-07-01	289.270
2004-10-01	304.254
2005-01-01	303.140
2005-04-01	304.874
2005-07-01	306.869
2005-10-01	313.760
2006-01-01	319.468
2006-04-01	324.010
2006-07-01	333.390
2006-10-01	345.442
2007-01-01	357.642
2007-04-01	382.951
2007-07-01	397.747
2007-10-01	419.045
2008-01-01	424.142
2008-04-01	474.416
2008-07-01	471.578
2008-10-01	435.177
2009-01-01	439.667
2009-04-01	482.869
2009-07-01	503.710
2009-10-01	532.369
2010-01-01	541.330
2010-04-01	555.609
2010-07-01	588.684
2010-10-01	618.233
2011-01-01	640.904
2011-04-01	665.982
2011-07-01	643.553
2011-10-01	662.528
2012-01-01	696.043
2012-04-01	679.553
2012-07-01	705.003
2012-10-01	705.619
2013-01-01	703.268
2013-04-01	689.301
2013-07-01	736.431
2013-10-01	757.938
2014-01-01	758.993
2014-04-01	775.827
2014-07-01	775.175
2014-10-01	770.586
2015-01-01	773.802
2015-04-01	773.578