Quarter	Millions of US Dollars
1967-04-01	25
1967-07-01	25
1967-10-01	25
1968-01-01	25
1968-04-01	55
1968-07-01	55
1968-10-01	75
1969-01-01	75
1969-04-01	75
1969-07-01	75
1969-10-01	75
1970-01-01	75
1970-04-01	75
1970-07-01	75
1970-10-01	75
1971-01-01	128
1971-04-01	211
1971-07-01	213
1971-10-01	213
1972-01-01	214
1972-04-01	214
1972-07-01	214
1972-10-01	304
1973-01-01	331
1973-04-01	339
1973-07-01	340
1973-10-01	333
1974-01-01	336
1974-04-01	385
1974-07-01	382
1974-10-01	429
1975-01-01	467
1975-04-01	494
1975-07-01	471
1975-10-01	495
1976-01-01	557
1976-04-01	697
1976-07-01	702
1976-10-01	729
1977-01-01	812
1977-04-01	1016
1977-07-01	1026
1977-10-01	1189
1978-01-01	1207
1978-04-01	1300
1978-07-01	1370
1978-10-01	1394
1979-01-01	1640
1979-04-01	1898
1979-07-01	2038
1979-10-01	2048
1980-01-01	2218
1980-04-01	2637
1980-07-01	2913
1980-10-01	2981
1981-01-01	3123
1981-04-01	3017
1981-07-01	3034
1981-10-01	3584
1982-01-01	4372
1982-04-01	4480
1982-07-01	4611
1982-10-01	5439
1983-01-01	5568
1983-04-01	5741
1983-07-01	5837
1983-10-01	6859
1984-01-01	7569
1984-04-01	7474
1984-07-01	8072
1984-10-01	9592
1985-01-01	10665
1985-04-01	12358
1985-07-01	13984
1985-10-01	15059
1986-01-01	15645
1986-04-01	17461
1986-07-01	19143
1986-10-01	20051
1987-01-01	22707
1987-04-01	23607
1987-07-01	24052
1987-10-01	29742
1988-01-01	30056
1988-04-01	30443
1988-07-01	31541
1988-10-01	33448
1989-01-01	33443
1989-04-01	33410
1989-07-01	34850
1989-10-01	37052
1990-01-01	37593
1990-04-01	41293
1990-07-01	46378
1990-10-01	48188
1991-01-01	52667
1991-04-01	53168
1991-07-01	55980
1991-10-01	60783
1992-01-01	58989
1992-04-01	65098
1992-07-01	65049
1992-10-01	58493
1993-01-01	58024
1993-04-01	59371
1993-07-01	71233
1993-10-01	71454
1994-01-01	76845
1994-04-01	80256
1994-07-01	86927
1994-10-01	91331
1995-01-01	95660
1995-04-01	103421
1995-07-01	105516
1995-10-01	108422
1996-01-01	108371
1996-04-01	112799
1996-07-01	114579
1996-10-01	117128
1997-01-01	116777
1997-04-01	123640
1997-07-01	125456
1997-10-01	127226
1998-01-01	128425
1998-04-01	137254
1998-07-01	141933
1998-10-01	150492
1999-01-01	149307
1999-04-01	171592
1999-07-01	190738
1999-10-01	197720
2000-01-01	206611
2000-04-01	227539
2000-07-01	227276
2000-10-01	251378
2001-01-01	262777
2001-04-01	272769
2001-07-01	299515
2001-10-01	318360
2002-01-01	327601
2002-04-01	363408
2002-07-01	366458
2002-10-01	393091
2003-01-01	425465
2003-04-01	449135
2003-07-01	467245
2003-10-01	526030
2004-01-01	538055
2004-04-01	566022
2004-07-01	578287
2004-10-01	653006
2005-01-01	643031
2005-04-01	639132
2005-07-01	628864
2005-10-01	641851
2006-01-01	673963
2006-04-01	736463
2006-07-01	754486
2006-10-01	812345
2007-01-01	848596
2007-04-01	913789
2007-07-01	958181
2007-10-01	1006628
2008-01-01	1101463
2008-04-01	1145662
2008-07-01	1045340
2008-10-01	1076948
2009-01-01	1063462
2009-04-01	1136899
2009-07-01	1209167
2009-10-01	1218843
2010-01-01	1147596
2010-04-01	1047018
2010-07-01	1198376
2010-10-01	1174542
2011-01-01	1264286
2011-04-01	1292943
2011-07-01	1208755
2011-10-01	1164735
2012-01-01	1167361
2012-04-01	1074968
2012-07-01	1096315
2012-10-01	1115433
2013-01-01	1065164
2013-04-01	1083983
2013-07-01	1136900
2013-10-01	1166512
2014-01-01	1162073
2014-04-01	1152068
2014-07-01	1036555
2014-10-01	998834
2015-01-01	898196
2015-04-01	931154
2015-07-01	919302
2015-10-01	886141
2016-01-01	904039
2016-04-01	887049
2016-07-01	880599
2016-10-01	830426
2017-01-01	845482
2017-04-01	916922
2017-07-01	950463
2017-10-01	962817
2018-01-01	991704
2018-04-01	937558