Quarter	Millions of US Dollars
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	56
1977-01-01	54
1977-04-01	55
1977-07-01	58
1977-10-01	0
1978-01-01	32
1978-04-01	73
1978-07-01	100
1978-10-01	233
1979-01-01	197
1979-04-01	155
1979-07-01	152
1979-10-01	41
1980-01-01	54
1980-04-01	62
1980-07-01	118
1980-10-01	102
1981-01-01	114
1981-04-01	127
1981-07-01	84
1981-10-01	70
1982-01-01	89
1982-04-01	83
1982-07-01	95
1982-10-01	236
1983-01-01	178
1983-04-01	151
1983-07-01	135
1983-10-01	55
1984-01-01	113
1984-04-01	169
1984-07-01	157
1984-10-01	363
1985-01-01	357
1985-04-01	302
1985-07-01	370
1985-10-01	147
1986-01-01	177
1986-04-01	400
1986-07-01	674
1986-10-01	668
1987-01-01	778
1987-04-01	917
1987-07-01	689
1987-10-01	887
1988-01-01	668
1988-04-01	247
1988-07-01	314
1988-10-01	284
1989-01-01	311
1989-04-01	273
1989-07-01	166
1989-10-01	185
1990-01-01	133
1990-04-01	156
1990-07-01	143
1990-10-01	88
1991-01-01	137
1991-04-01	113
1991-07-01	187
1991-10-01	330
1992-01-01	357
1992-04-01	441
1992-07-01	482
1992-10-01	497
1993-01-01	478
1993-04-01	470
1993-07-01	567
1993-10-01	414
1994-01-01	334
1994-04-01	215
1994-07-01	356
1994-10-01	557
1995-01-01	645
1995-04-01	800
1995-07-01	653
1995-10-01	289
1996-01-01	334
1996-04-01	316
1996-07-01	289
1996-10-01	354
1997-01-01	281
1997-04-01	288
1997-07-01	348
1997-10-01	378
1998-01-01	426
1998-04-01	361
1998-07-01	343
1998-10-01	153
1999-01-01	75
1999-04-01	98
1999-07-01	60
1999-10-01	257
2000-01-01	288
2000-04-01	322
2000-07-01	272
2000-10-01	176
2001-01-01	196
2001-04-01	142
2001-07-01	158
2001-10-01	119
2002-01-01	48
2002-04-01	122
2002-07-01	121
2002-10-01	374
2003-01-01	707
2003-04-01	652
2003-07-01	667
2003-10-01	369
2004-01-01	203
2004-04-01	265
2004-07-01	573
2004-10-01	973
2005-01-01	1066
2005-04-01	999
2005-07-01	1150
2005-10-01	708
2006-01-01	992
2006-04-01	1097
2006-07-01	593
2006-10-01	351
2007-01-01	33
2007-04-01	605
2007-07-01	842
2007-10-01	1518
2008-01-01	2116
2008-04-01	2754
2008-07-01	2375
2008-10-01	3270
2009-01-01	4423
2009-04-01	3620
2009-07-01	4206
2009-10-01	3541
2010-01-01	1681
2010-04-01	1655
2010-07-01	1196
2010-10-01	1933
2011-01-01	2022
2011-04-01	2717
2011-07-01	2598
2011-10-01	2057
2012-01-01	2551
2012-04-01	1840
2012-07-01	1995
2012-10-01	3539
2013-01-01	5616
2013-04-01	6928
2013-07-01	8014
2013-10-01	6874
2014-01-01	4336
2014-04-01	3068
2014-07-01	2076
2014-10-01	2428
2015-01-01	1972
2015-04-01	2272
2015-07-01	2048
2015-10-01	1481
2016-01-01	2000
2016-04-01	1873
2016-07-01	1883
2016-10-01	2099
2017-01-01	3395
2017-04-01	3538
2017-07-01	3849
2017-10-01	3808
2018-01-01	1922
2018-04-01	1682