Quarter	Millions of US Dollars
1994-07-01	520
1994-10-01	520
1995-01-01	520
1995-04-01	520
1995-07-01	520
1995-10-01	520
1996-01-01	520
1996-04-01	520
1996-07-01	520
1996-10-01	520
1997-01-01	520
1997-04-01	520
1997-07-01	718
1997-10-01	718
1998-01-01	716
1998-04-01	716
1998-07-01	739
1998-10-01	779
1999-01-01	773
1999-04-01	734
1999-07-01	728
1999-10-01	748
2000-01-01	735
2000-04-01	735
2000-07-01	726
2000-10-01	721
2001-01-01	717
2001-04-01	727
2001-07-01	1217
2001-10-01	1215
2002-01-01	1220
2002-04-01	1220
2002-07-01	1197
2002-10-01	1224
2003-01-01	1800
2003-04-01	1795
2003-07-01	1785
2003-10-01	1772
2004-01-01	1762
2004-04-01	1762
2004-07-01	1552
2004-10-01	1552
2005-01-01	1543
2005-04-01	512
2005-07-01	466
2005-10-01	601
2006-01-01	891
2006-04-01	891
2006-07-01	861
2006-10-01	1111
2007-01-01	1533
2007-04-01	1528
2007-07-01	1516
2007-10-01	1515
2008-01-01	1504
2008-04-01	1500
2008-07-01	1487
2008-10-01	1487
2009-01-01	1426
2009-04-01	1425
2009-07-01	1415
2009-10-01	1415
2010-01-01	1412
2010-04-01	2161
2010-07-01	2160
2010-10-01	2282
2011-01-01	2321
2011-04-01	2321
2011-07-01	2821
2011-10-01	3069
2012-01-01	2921
2012-04-01	2716
2012-07-01	2716
2012-10-01	3266
2013-01-01	3553
2013-04-01	4553
2013-07-01	4553
2013-10-01	4803
2014-01-01	4803
2014-04-01	6053
2014-07-01	6303
2014-10-01	6303
2015-01-01	8803
2015-04-01	9803
2015-07-01	9803
2015-10-01	9544
2016-01-01	10504
2016-04-01	11244
2016-07-01	11744
2016-10-01	11744
2017-01-01	12711
2017-04-01	13211
2017-07-01	13211
2017-10-01	13211
2018-01-01	15021
2018-04-01	15021