Quarter	Millions of US Dollars
1994-01-01	984
1994-04-01	450
1994-07-01	640
1994-10-01	22
1995-01-01	-104
1995-04-01	195
1995-07-01	83
1995-10-01	1437
1996-01-01	508
1996-04-01	515
1996-07-01	1002
1996-10-01	1295
1997-01-01	1015
1997-04-01	788
1997-07-01	-196
1997-10-01	48
1998-01-01	382
1998-04-01	122
1998-07-01	-173
1998-10-01	898
1999-01-01	328
1999-04-01	207
1999-07-01	1038
1999-10-01	866
2000-01-01	351
2000-04-01	246
2000-07-01	239
2000-10-01	392
2001-01-01	334
2001-04-01	88
2001-07-01	-241
2001-10-01	534
2002-01-01	-240
2002-04-01	95
2002-07-01	28
2002-10-01	-1813
2003-01-01	117
2003-04-01	-322
2003-07-01	544
2003-10-01	561
2004-01-01	639
2004-04-01	-1
2004-07-01	-428
2004-10-01	-623
2005-01-01	-303
2005-04-01	547
2005-07-01	837
2005-10-01	751
2006-01-01	-626
2006-04-01	241
2006-07-01	683
2006-10-01	412
2007-01-01	732
2007-04-01	-1209
2007-07-01	539
2007-10-01	737
2008-01-01	773
2008-04-01	1434
2008-07-01	1238
2008-10-01	1624
2009-01-01	638
2009-04-01	-501
2009-07-01	1865
2009-10-01	1999
2010-01-01	450
2010-04-01	-121
2010-07-01	-270
2010-10-01	2186
2011-01-01	-273
2011-04-01	97
2011-07-01	1560
2011-10-01	-630
2012-01-01	775
2012-04-01	-1301
2012-07-01	1057
2012-10-01	96
2013-01-01	555
2013-04-01	29
2013-07-01	2119
2013-10-01	1373
2014-01-01	1410
2014-04-01	850
2014-07-01	354
2014-10-01	977
2015-01-01	1009
2015-04-01	431
2015-07-01	154
2015-10-01	701
2016-01-01	541
2016-04-01	176
2016-07-01	1634
2016-10-01	1135
2017-01-01	527
2017-04-01	-496
2017-07-01	1519
2017-10-01	793
2018-01-01	2102