Quarter	Millions of US Dollars
1995-10-01	150
1996-01-01	150
1996-04-01	150
1996-07-01	150
1996-10-01	150
1997-01-01	150
1997-04-01	150
1997-07-01	1350
1997-10-01	3538
1998-01-01	3350
1998-04-01	3350
1998-07-01	3350
1998-10-01	3350
1999-01-01	3350
1999-04-01	3532
1999-07-01	3692
1999-10-01	3583
2000-01-01	3600
2000-04-01	3606
2000-07-01	3601
2000-10-01	3457
2001-01-01	3463
2001-04-01	3470
2001-07-01	3372
2001-10-01	3372
2002-01-01	3450
2002-04-01	3450
2002-07-01	3450
2002-10-01	3350
2003-01-01	3350
2003-04-01	3600
2003-07-01	3650
2003-10-01	3650
2004-01-01	3650
2004-04-01	3650
2004-07-01	3050
2004-10-01	3050
2005-01-01	3050
2005-04-01	3050
2005-07-01	3050
2005-10-01	3060
2006-01-01	3060
2006-04-01	3077
2006-07-01	3157
2006-10-01	3007
2007-01-01	3077
2007-04-01	3143
2007-07-01	2693
2007-10-01	2525
2008-01-01	2689
2008-04-01	2638
2008-07-01	2439
2008-10-01	2423
2009-01-01	2303
2009-04-01	2319
2009-07-01	2332
2009-10-01	2349
2010-01-01	2190
2010-04-01	1890
2010-07-01	1933
2010-10-01	1928
2011-01-01	1814
2011-04-01	1797
2011-07-01	1789
2011-10-01	1769
2012-01-01	1772
2012-04-01	1735
2012-07-01	2149
2012-10-01	789
2013-01-01	789
2013-04-01	789
2013-07-01	914
2013-10-01	914
2014-01-01	853
2014-04-01	849
2014-07-01	835
2014-10-01	2412
2015-01-01	2391
2015-04-01	2400
2015-07-01	2377
2015-10-01	1976
2016-01-01	1983
2016-04-01	1975
2016-07-01	2272
2016-10-01	3264
2017-01-01	4465
2017-04-01	4387
2017-07-01	4979
2017-10-01	4873
2018-01-01	5370
2018-04-01	5355