Quarter	Millions of US Dollars
1995-07-01	300
1996-01-01	50
1996-04-01	100
1996-07-01	110
1996-10-01	276
1997-01-01	4
1997-04-01	473
1997-07-01	100
1997-10-01	700
1998-01-01	19
1998-04-01	1000
1998-07-01	350
1998-10-01	105
1999-01-01	536
1999-04-01	60
1999-07-01	22
1999-10-01	563
2000-01-01	-11
2000-04-01	665
2000-07-01	272
2000-10-01	834
2001-01-01	19
2001-04-01	1050
2001-07-01	1210
2001-10-01	160
2002-01-01	1000
2002-04-01	398
2002-07-01	865
2002-10-01	3230
2003-01-01	700
2003-04-01	245
2003-07-01	-416
2003-10-01	18
2004-01-01	-857
2004-04-01	1210
2004-07-01	1315
2004-10-01	2132
2005-01-01	-1168
2005-04-01	2221
2005-07-01	-149
2005-10-01	995
2006-01-01	890
2006-04-01	2870
2006-07-01	-199
2006-10-01	-341
2007-01-01	-300
2007-04-01	3
2007-07-01	188
2007-10-01	-229
2008-01-01	6
2008-04-01	382
2008-07-01	-310
2009-01-01	2100
2009-04-01	-306
2009-07-01	-352
2009-10-01	-2001
2010-01-01	135
2010-04-01	-100
2010-07-01	-170
2010-10-01	1020
2011-01-01	530
2011-04-01	300
2011-07-01	1150
2011-10-01	2647
2012-01-01	-600
2012-04-01	3229
2012-07-01	-800
2012-10-01	4065
2013-01-01	-875
2013-04-01	2500
2013-07-01	175
2014-04-01	498
2015-01-01	1950
2015-04-01	-2500
2015-07-01	-500
2015-10-01	1600
2016-01-01	-318
2016-04-01	2000
2016-10-01	130
2017-01-01	1581
2017-04-01	20
2017-07-01	-384
2017-10-01	-4139
2018-01-01	-691
2018-04-01	4901