Quarter	Millions of US Dollars
1994-07-01	5118
1994-10-01	5118
1995-01-01	5118
1995-04-01	5118
1995-07-01	5118
1995-10-01	5118
1996-01-01	5118
1996-04-01	5118
1996-07-01	5118
1996-10-01	5118
1997-01-01	5118
1997-04-01	5118
1997-07-01	5150
1997-10-01	5150
1998-01-01	5151
1998-04-01	5151
1998-07-01	5152
1998-10-01	5152
1999-01-01	5153
1999-04-01	5205
1999-07-01	5207
1999-10-01	5205
2000-01-01	5203
2000-04-01	5203
2000-07-01	5200
2000-10-01	5203
2001-01-01	5201
2001-04-01	5200
2001-07-01	5188
2001-10-01	5407
2002-01-01	5046
2002-04-01	5061
2002-07-01	4980
2002-10-01	4180
2003-01-01	4175
2003-04-01	4233
2003-07-01	4207
2003-10-01	4314
2004-01-01	4260
2004-04-01	4254
2004-07-01	3603
2004-10-01	3735
2005-01-01	2574
2005-04-01	2481
2005-07-01	1868
2005-10-01	1842
2006-01-01	1877
2006-04-01	1943
2006-07-01	1938
2006-10-01	1995
2007-01-01	1679
2007-04-01	1695
2007-07-01	1752
2007-10-01	1798
2008-01-01	1890
2008-04-01	1887
2008-07-01	1766
2008-10-01	1735
2009-01-01	1685
2009-04-01	1755
2009-07-01	1748
2009-10-01	1703
2010-01-01	1627
2010-04-01	1529
2010-07-01	1642
2010-10-01	1619
2011-01-01	1688
2011-04-01	1708
2011-07-01	1631
2011-10-01	1585
2012-01-01	1620
2012-04-01	1558
2012-07-01	2814
2012-10-01	2861
2013-01-01	1747
2013-04-01	1773
2013-07-01	1814
2013-10-01	1842
2014-01-01	1842
2014-04-01	1830
2014-07-01	3607
2014-10-01	3499
2015-01-01	5988
2015-04-01	6226
2015-07-01	6235
2015-10-01	6169
2016-01-01	8721
2016-04-01	8505
2016-07-01	8551
2016-10-01	8078
2017-01-01	8193
2017-04-01	8744
2017-07-01	7930
2017-10-01	8049
2018-01-01	8269
2018-04-01	7827