Quarter	Millions of US Dollars
1962-10-01	0
1963-01-01	0
1963-04-01	0
1963-07-01	0
1963-10-01	0
1964-01-01	0
1964-04-01	0
1964-07-01	0
1964-10-01	0
1965-01-01	0
1965-04-01	0
1965-07-01	0
1965-10-01	0
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	32
1976-07-01	33
1976-10-01	33
1977-01-01	31
1977-04-01	0
1977-07-01	0
1977-10-01	37
1978-01-01	93
1978-04-01	151
1978-07-01	313
1978-10-01	537
1979-01-01	749
1979-04-01	1039
1979-07-01	1511
1979-10-01	1930
1980-01-01	2003
1980-04-01	2289
1980-07-01	2071
1980-10-01	2197
1981-01-01	3006
1981-04-01	3806
1981-07-01	4053
1981-10-01	4482
1982-01-01	5014
1982-04-01	5479
1982-07-01	6075
1982-10-01	6293
1983-01-01	5024
1983-04-01	4600
1983-07-01	4549
1983-10-01	4422
1984-01-01	6721
1984-04-01	5546
1984-07-01	5712
1984-10-01	10504
1985-01-01	10346
1985-04-01	11570
1985-07-01	12643
1985-10-01	11917
1986-01-01	12424
1986-04-01	14786
1986-07-01	16378
1986-10-01	14095
1987-01-01	14895
1987-04-01	15390
1987-07-01	15015
1987-10-01	21521
1988-01-01	23055
1988-04-01	22034
1988-07-01	21724
1988-10-01	19580
1989-01-01	16661
1989-04-01	16844
1989-07-01	16577
1989-10-01	16714
1990-01-01	17832
1990-04-01	15755
1990-07-01	17201
1990-10-01	21075
1991-01-01	21592
1991-04-01	22882
1991-07-01	24332
1991-10-01	21175
1992-01-01	18279
1992-04-01	21212
1992-07-01	24154
1992-10-01	23897
1993-01-01	25296
1993-04-01	25008
1993-07-01	39128
1993-10-01	36730
1994-01-01	37384
1994-04-01	34349
1994-07-01	34549
1994-10-01	40719
1995-01-01	47995
1995-04-01	53960
1995-07-01	58448
1995-10-01	58600
1996-01-01	58145
1996-04-01	55002
1996-07-01	58490
1996-10-01	77054
1997-01-01	75703
1997-04-01	79424
1997-07-01	73247
1997-10-01	85558
1998-01-01	87678
1998-04-01	87029
1998-07-01	95074
1998-10-01	71511
1999-01-01	65614
1999-04-01	74550
1999-07-01	69380
1999-10-01	68223
2000-01-01	77080
2000-04-01	112750
2000-07-01	110997
2000-10-01	123136
2001-01-01	113157
2001-04-01	83651
2001-07-01	82346
2001-10-01	77168
2002-01-01	96714
2002-04-01	101933
2002-07-01	106555
2002-10-01	109497
2003-01-01	101654
2003-04-01	97736
2003-07-01	94331
2003-10-01	88849
2004-01-01	89961
2004-04-01	128785
2004-07-01	137460
2004-10-01	139189
2005-01-01	149723
2005-04-01	120344
2005-07-01	119374
2005-10-01	127309
2006-01-01	123959
2006-04-01	115091
2006-07-01	103510
2006-10-01	85263
2007-01-01	111735
2007-04-01	148333
2007-07-01	180269
2007-10-01	160828
2008-01-01	170220
2008-04-01	177044
2008-07-01	148062
2008-10-01	156824
2009-01-01	153794
2009-04-01	154781
2009-07-01	152900
2009-10-01	132410
2010-01-01	139237
2010-04-01	127527
2010-07-01	166405
2010-10-01	148609
2011-01-01	185733
2011-04-01	186594
2011-07-01	193679
2011-10-01	194932
2012-01-01	168801
2012-04-01	168769
2012-07-01	149858
2012-10-01	172818
2013-01-01	178838
2013-04-01	171718
2013-07-01	193284
2013-10-01	197497
2014-01-01	206208
2014-04-01	212579
2014-07-01	199870
2014-10-01	213081
2015-01-01	178277
2015-04-01	172593
2015-07-01	201125
2015-10-01	165228
2016-01-01	172318
2016-04-01	186783
2016-07-01	173141
2016-10-01	191424
2017-01-01	198587
2017-04-01	182458
2017-07-01	177708
2017-10-01	156993
2018-01-01	150524
2018-04-01	175893