Quarter	Billions of US Dollars
1967-01-01	1.457
1967-04-01	1.478
1967-07-01	1.511
1967-10-01	1.614
1968-01-01	1.676
1968-04-01	1.762
1968-07-01	1.774
1968-10-01	1.884
1969-01-01	1.933
1969-04-01	1.994
1969-07-01	2.022
1969-10-01	2.184
1970-01-01	2.237
1970-04-01	2.273
1970-07-01	2.340
1970-10-01	2.449
1971-01-01	2.618
1971-04-01	2.728
1971-07-01	2.905
1971-10-01	3.112
1972-01-01	3.364
1972-04-01	3.464
1972-07-01	3.720
1972-10-01	3.810
1973-01-01	4.535
1973-04-01	4.965
1973-07-01	5.359
1973-10-01	5.426
1974-01-01	5.836
1974-04-01	6.018
1974-07-01	6.161
1974-10-01	6.681
1975-01-01	7.182
1975-04-01	7.234
1975-07-01	6.776
1975-10-01	7.249
1976-01-01	7.770
1976-04-01	8.237
1976-07-01	8.765
1976-10-01	9.074
1977-01-01	9.645
1977-04-01	10.190
1977-07-01	10.749
1977-10-01	11.490
1978-01-01	11.959
1978-04-01	12.441
1978-07-01	13.540
1978-10-01	14.653
1979-01-01	15.628
1979-04-01	16.837
1979-07-01	17.719
1979-10-01	18.342
1980-01-01	18.841
1980-04-01	21.318
1980-07-01	22.416
1980-10-01	22.633
1981-01-01	23.813
1981-04-01	24.989
1981-07-01	25.644
1981-10-01	28.848
1982-01-01	29.168
1982-04-01	30.613
1982-07-01	31.093
1982-10-01	35.011
1983-01-01	37.413
1983-04-01	38.544
1983-07-01	40.299
1983-10-01	43.312
1984-01-01	45.673
1984-04-01	46.558
1984-07-01	47.524
1984-10-01	48.329
1985-01-01	47.853
1985-04-01	50.027
1985-07-01	52.172
1985-10-01	55.716
1986-01-01	53.868
1986-04-01	54.091
1986-07-01	55.648
1986-10-01	57.056
1987-01-01	59.269
1987-04-01	59.624
1987-07-01	60.371
1987-10-01	63.118
1988-01-01	62.752
1988-04-01	62.976
1988-07-01	61.778
1988-10-01	63.497
1989-01-01	65.213
1989-04-01	67.006
1989-07-01	68.779
1989-10-01	70.615
1990-01-01	71.191
1990-04-01	73.686
1990-07-01	77.155
1990-10-01	81.132
1991-01-01	81.411
1991-04-01	82.883
1991-07-01	88.652
1991-10-01	92.114
1992-01-01	98.669
1992-04-01	103.540
1992-07-01	106.229
1992-10-01	101.648
1993-01-01	103.619
1993-04-01	106.610
1993-07-01	108.799
1993-10-01	106.761
1994-01-01	107.836
1994-04-01	112.894
1994-07-01	120.502
1994-10-01	124.299
1995-01-01	130.697
1995-04-01	141.120
1995-07-01	144.497
1995-10-01	151.563
1996-01-01	158.159
1996-04-01	168.371
1996-07-01	176.619
1996-10-01	187.241
1997-01-01	200.796
1997-04-01	207.074
1997-07-01	170.264
1997-10-01	147.995
1998-01-01	156.916
1998-04-01	139.738
1998-07-01	150.783
1998-10-01	154.521
1999-01-01	150.467
1999-04-01	150.936
1999-07-01	152.942
1999-10-01	152.605
2000-01-01	153.421
2000-04-01	157.424
2000-07-01	160.012
2000-10-01	163.035
2001-01-01	163.756
2001-04-01	165.746
2001-07-01	170.704
2001-10-01	173.840
2002-01-01	175.817
2002-04-01	178.956
2002-07-01	182.806
2002-10-01	187.857
2003-01-01	191.728
2003-04-01	196.398
2003-07-01	199.341
2003-10-01	199.573
2004-01-01	206.624
2004-04-01	212.193
2004-07-01	215.981
2004-10-01	219.892
2005-01-01	223.178
2005-04-01	224.398
2005-07-01	234.309
2005-10-01	239.892
2006-01-01	246.885
2006-04-01	253.234
2006-07-01	255.658
2006-10-01	269.467
2007-01-01	278.059
2007-04-01	284.312
2007-07-01	301.356
2007-10-01	309.372
2008-01-01	324.334
2008-04-01	328.995
2008-07-01	328.421
2008-10-01	336.806
2009-01-01	323.733
2009-04-01	341.553
2009-07-01	357.544
2009-10-01	370.496
2010-01-01	397.261
2010-04-01	409.613
2010-07-01	437.544
2010-10-01	454.338
2011-01-01	473.035
2011-04-01	488.340
2011-07-01	474.365
2011-10-01	494.025
2012-01-01	513.251
2012-04-01	515.326
2012-07-01	544.039
2012-10-01	558.312
2013-01-01	560.962
2013-04-01	562.609
2013-07-01	553.873
2013-10-01	569.541
2014-01-01	585.438
2014-04-01	608.125
2014-07-01	602.261
2014-10-01	586.499
2015-01-01	566.714
2015-04-01	575.249
2015-07-01	501.662
2015-10-01	518.145
2016-01-01	576.202
2016-04-01	570.453
2016-07-01	555.818
2016-10-01	524.982
2017-01-01	541.210
2017-04-01	570.158
2017-07-01	583.945
2017-10-01	619.046
2018-01-01	662.539