Quarter	Millions of US Dollars
1994-07-01	255
1995-10-01	62
1996-10-01	280
1998-01-01	200
1998-04-01	864
1998-07-01	81
1998-10-01	200
1999-01-01	0
1999-04-01	412
1999-07-01	-56
1999-10-01	161
2000-01-01	159
2000-04-01	623
2000-07-01	34
2000-10-01	-59
2001-04-01	98
2001-07-01	-80
2001-10-01	-80
2002-04-01	143
2002-10-01	-256
2003-04-01	-306
2003-07-01	-93
2003-10-01	287
2004-01-01	-7
2004-04-01	841
2004-10-01	-259
2005-04-01	-944
2005-10-01	-200
2006-01-01	1202
2006-07-01	-153
2006-10-01	-200
2007-04-01	1078
2009-04-01	2724
2010-04-01	1414
2011-01-01	1703
2011-04-01	1157
2012-04-01	3550
2013-04-01	2220
2013-07-01	971
2013-10-01	2528
2014-01-01	562
2014-04-01	-321
2014-10-01	-721
2015-01-01	-1032
2016-01-01	-1377
2016-04-01	-239
2017-04-01	-1102
2018-01-01	387
2018-04-01	-368