Quarter	Billions of US Dollars
1966-01-01	0
1966-04-01	0
1966-07-01	0
1966-10-01	0
1967-01-01	0
1967-04-01	0
1967-07-01	0
1967-10-01	0
1968-01-01	0
1968-04-01	0
1968-07-01	0
1968-10-01	0
1969-01-01	0
1969-04-01	0
1969-07-01	0
1969-10-01	0
1970-01-01	0
1970-04-01	0
1970-07-01	0
1970-10-01	0
1971-01-01	0
1971-04-01	0
1971-07-01	0
1971-10-01	0
1972-01-01	0
1972-04-01	0
1972-07-01	0
1972-10-01	0
1973-01-01	0
1973-04-01	0
1973-07-01	0
1973-10-01	0
1974-01-01	0
1974-04-01	0
1974-07-01	0
1974-10-01	0
1975-01-01	0
1975-04-01	0
1975-07-01	0
1975-10-01	0
1976-01-01	0
1976-04-01	0
1976-07-01	0
1976-10-01	0
1977-01-01	24
1977-04-01	41
1977-07-01	43
1977-10-01	47
1978-01-01	17
1978-04-01	0
1978-07-01	0
1978-10-01	0
1979-01-01	30
1979-04-01	30
1979-07-01	52
1979-10-01	53
1980-01-01	127
1980-04-01	129
1980-07-01	138
1980-10-01	207
1981-01-01	93
1981-04-01	268
1981-07-01	272
1981-10-01	214
1982-01-01	333
1982-04-01	192
1982-07-01	324
1982-10-01	367
1983-01-01	365
1983-04-01	409
1983-07-01	341
1983-10-01	313
1984-01-01	233
1984-04-01	229
1984-07-01	229
1984-10-01	395
1985-01-01	424
1985-04-01	377
1985-07-01	365
1985-10-01	419
1986-01-01	368
1986-04-01	579
1986-07-01	564
1986-10-01	354
1987-01-01	432
1987-04-01	438
1987-07-01	556
1987-10-01	1107
1988-01-01	1021
1988-04-01	769
1988-07-01	722
1988-10-01	324
1989-01-01	355
1989-04-01	392
1989-07-01	378
1989-10-01	472
1990-01-01	576
1990-04-01	1001
1990-07-01	1149
1990-10-01	1541
1991-01-01	1546
1991-04-01	1247
1991-07-01	1558
1991-10-01	1486
1992-01-01	2220
1992-04-01	2825
1992-07-01	3604
1992-10-01	3788
1993-01-01	3968
1993-04-01	3772
1993-07-01	5179
1993-10-01	4989
1994-01-01	5209
1994-04-01	5472
1994-07-01	5162
1994-10-01	4201
1995-01-01	4422
1995-04-01	6440
1995-07-01	7654
1995-10-01	7439
1996-01-01	8682
1996-04-01	10117
1996-07-01	7511
1996-10-01	12226
1997-01-01	12168
1997-04-01	13167
1997-07-01	13614
1997-10-01	13778
1998-01-01	16321
1998-04-01	15724
1998-07-01	12361
1998-10-01	14727
1999-01-01	13152
1999-04-01	14236
1999-07-01	17204
1999-10-01	17799
2000-01-01	16612
2000-04-01	19655
2000-07-01	20104
2000-10-01	23406
2001-01-01	23750
2001-04-01	25770
2001-07-01	29825
2001-10-01	31075
2002-01-01	30625
2002-04-01	35868
2002-07-01	28226
2002-10-01	27909
2003-01-01	26435
2003-04-01	25300
2003-07-01	30031
2003-10-01	44837
2004-01-01	40354
2004-04-01	43981
2004-07-01	39124
2004-10-01	45698
2005-01-01	53179
2005-04-01	48815
2005-07-01	51201
2005-10-01	53162
2006-01-01	59037
2006-04-01	62876
2006-07-01	62775
2006-10-01	67550
2007-01-01	66280
2007-04-01	67097
2007-07-01	75743
2007-10-01	81882
2008-01-01	86845
2008-04-01	98404
2008-07-01	88162
2008-10-01	65120
2009-01-01	63167
2009-04-01	71422
2009-07-01	80590
2009-10-01	81878
2010-01-01	84021
2010-04-01	82181
2010-07-01	87136
2010-10-01	77250
2011-01-01	76659
2011-04-01	71873
2011-07-01	60068
2011-10-01	60249
2012-01-01	76563
2012-04-01	79401
2012-07-01	85652
2012-10-01	87120
2013-01-01	88654
2013-04-01	95638
2013-07-01	111111
2013-10-01	112700
2014-01-01	122636
2014-04-01	120859
2014-07-01	102256
2014-10-01	93384
2015-01-01	85368
2015-04-01	87097
2015-07-01	95269
2015-10-01	103536
2016-01-01	113627
2016-04-01	114912
2016-07-01	113725
2016-10-01	122181
2017-01-01	116386
2017-04-01	134333
2017-07-01	142385
2017-10-01	133000
2018-01-01	131935
2018-04-01	113657