Quarter	Millions of US Dollars
1995-01-01	63
1995-04-01	59
1995-07-01	57
1995-10-01	56
1996-01-01	55
1996-04-01	55
1996-07-01	43
1996-10-01	47
1997-01-01	53
1997-04-01	62
1997-07-01	68
1997-10-01	51
1998-01-01	45
1998-04-01	47
1998-07-01	50
1998-10-01	47
1999-01-01	45
1999-04-01	43
1999-07-01	43
1999-10-01	41
2000-01-01	28
2000-04-01	24
2000-07-01	13
2000-10-01	6
2001-01-01	6
2001-04-01	6
2001-07-01	6
2001-10-01	61
2002-01-01	78
2002-04-01	150
2002-07-01	131
2002-10-01	139
2003-01-01	176
2003-04-01	225
2003-07-01	230
2003-10-01	738
2004-01-01	1005
2004-04-01	1076
2004-07-01	1644
2004-10-01	2321
2005-01-01	2676
2005-04-01	2925
2005-07-01	4059
2005-10-01	7198
2006-01-01	8177
2006-04-01	9297
2006-07-01	10681
2006-10-01	13403
2007-01-01	13973
2007-04-01	14918
2007-07-01	16991
2007-10-01	19389
2008-01-01	23676
2008-04-01	25706
2008-07-01	24801
2008-10-01	26256
2009-01-01	25306
2009-04-01	27025
2009-07-01	28590
2009-10-01	28842
2010-01-01	27482
2010-04-01	69
2010-07-01	97
2010-10-01	82
2011-01-01	87
2011-04-01	88
2011-07-01	82
2011-10-01	79
2012-01-01	81
2012-04-01	77
2012-07-01	2122
2012-10-01	640
2013-01-01	535
2013-04-01	547
2013-07-01	539
2013-10-01	550
2014-01-01	547
2014-04-01	695
2014-07-01	527
2014-10-01	509
2015-01-01	428
2015-04-01	445
2015-07-01	446
2015-10-01	439
2016-01-01	459
2016-04-01	451
2016-07-01	458
2016-10-01	2323
2017-01-01	779
2017-04-01	1230
2017-07-01	835
2017-10-01	836
2018-01-01	857