Quarter	Millions of US Dollars
1994-10-01	5840
1995-07-01	250
1996-07-01	164
1997-07-01	400
1998-10-01	-495
2000-01-01	577
2000-07-01	-250
2000-10-01	-944
2001-01-01	691
2001-04-01	-289
2001-07-01	-114
2001-10-01	219
2002-01-01	633
2002-07-01	1375
2002-10-01	-703
2003-01-01	1609
2003-04-01	-203
2003-07-01	1673
2003-10-01	1007
2004-01-01	3067
2004-04-01	1265
2005-01-01	4589
2005-04-01	6636
2005-07-01	-903
2005-10-01	1523
2006-01-01	3607
2006-07-01	-637
2006-10-01	723
2007-01-01	1966
2007-04-01	1227
2007-07-01	-300
2007-10-01	394
2008-01-01	-777
2008-04-01	4041
2008-07-01	-210
2009-01-01	1931
2009-04-01	1726
2009-07-01	3135
2009-10-01	1832
2010-01-01	5488
2010-04-01	-360
2010-07-01	2640
2010-10-01	-1032
2011-01-01	541
2011-04-01	2000
2011-07-01	433
2011-10-01	2000
2012-01-01	1672
2012-04-01	1404
2012-07-01	600
2012-10-01	4697
2013-01-01	-3565
2013-10-01	2514
2014-01-01	-316
2014-04-01	-2365
2014-07-01	-286
2014-10-01	-188
2015-04-01	120
2015-07-01	722
2015-10-01	165
2016-01-01	-925
2016-04-01	2597
2016-07-01	-1049
2016-10-01	2198
2017-01-01	-799
2017-04-01	-479
2017-10-01	3390
2018-01-01	1229
2018-04-01	-3427