Quarter	Millions of US Dollars
1972-01-01	40
1972-04-01	40
1972-10-01	35
1973-01-01	31
1973-07-01	38
1973-10-01	30
1975-01-01	75
1975-04-01	43
1976-01-01	50
1976-04-01	72
1977-04-01	133
1977-10-01	78
1978-01-01	256
1980-01-01	-75
1980-04-01	36
1981-01-01	-50
1981-04-01	100
1981-07-01	90
1981-10-01	144
1982-01-01	183
1982-04-01	-130
1982-07-01	175
1983-01-01	-149
1983-04-01	-40
1984-04-01	-37
1985-01-01	-61
1985-04-01	-16
1985-07-01	-42
1985-10-01	-112
1986-04-01	-44
1986-10-01	-100
1987-01-01	-76
1987-04-01	-40
1987-10-01	-119
1988-01-01	-9
1988-04-01	-100
1988-07-01	-175
1988-10-01	-56
1990-01-01	34390
1991-01-01	201
1991-07-01	91
1991-10-01	166
1992-07-01	250
1993-01-01	200
1993-07-01	394
1993-10-01	-4
1994-01-01	59
1994-04-01	-45
1994-07-01	451
1994-10-01	-291
1995-01-01	-542
1995-04-01	487
1995-07-01	1963
1995-10-01	1096
1996-01-01	3344
1996-04-01	362
1996-07-01	7574
1996-10-01	655
1997-01-01	2246
1997-04-01	2592
1997-07-01	-5719
1997-10-01	671
1998-01-01	789
1998-04-01	101
1998-07-01	-295
1998-10-01	-168
1999-01-01	953
1999-04-01	2670
1999-07-01	451
1999-10-01	1211
2000-01-01	1910
2000-04-01	-553
2000-07-01	1801
2000-10-01	-1399
2001-01-01	4472
2001-04-01	-3926
2001-07-01	819
2001-10-01	-5095
2002-01-01	1178
2002-04-01	-3968
2002-07-01	747
2002-10-01	746
2003-01-01	-7276
2003-04-01	-2263
2003-07-01	-2899
2003-10-01	720
2004-01-01	1445
2004-04-01	991
2004-07-01	292
2004-10-01	443
2005-01-01	989
2005-04-01	-317
2005-10-01	-289
2006-01-01	268
2006-04-01	-875
2006-07-01	-1330
2006-10-01	-311
2007-01-01	-2030
2007-07-01	1000
2007-10-01	-276
2008-01-01	-640
2008-04-01	-302
2008-07-01	-564
2008-10-01	806
2009-01-01	-914
2009-04-01	-500
2009-07-01	1750
2009-10-01	1677
2010-01-01	-2616
2010-04-01	1000
2010-07-01	1097
2010-10-01	2788
2011-01-01	-546
2011-04-01	1000
2011-07-01	1000
2012-01-01	2738
2012-04-01	743
2013-01-01	-245
2013-04-01	604
2013-07-01	821
2013-10-01	3900
2014-01-01	2361
2014-04-01	1183
2014-07-01	-547
2014-10-01	2000
2015-01-01	5312
2015-04-01	644
2015-07-01	-97
2016-01-01	5049
2016-04-01	1255
2016-07-01	-2215
2016-10-01	1378
2017-01-01	2792
2017-04-01	-3102
2017-10-01	-1120
2018-01-01	5000
2018-04-01	1262