Quarter	Millions of US Dollars
1995-10-01	60
1996-01-01	60
1996-04-01	60
1996-07-01	110
1996-10-01	110
1997-01-01	110
1997-04-01	110
1997-07-01	310
1997-10-01	200
1998-01-01	200
1998-04-01	200
1998-07-01	200
1998-10-01	200
1999-01-01	415
1999-04-01	407
1999-07-01	467
1999-10-01	702
2000-01-01	916
2000-04-01	937
2000-07-01	978
2000-10-01	1050
2001-01-01	1223
2001-04-01	1186
2001-07-01	1235
2001-10-01	1201
2002-01-01	1192
2002-04-01	1734
2002-07-01	1516
2002-10-01	1612
2003-01-01	2111
2003-04-01	1928
2003-07-01	1920
2003-10-01	2081
2004-01-01	2389
2004-04-01	2375
2004-07-01	2487
2004-10-01	2730
2005-01-01	2954
2005-04-01	2756
2005-07-01	2744
2005-10-01	2742
2006-01-01	3208
2006-04-01	3369
2006-07-01	3355
2006-10-01	4330
2007-01-01	4378
2007-04-01	4675
2007-07-01	4835
2007-10-01	5902
2008-01-01	6019
2008-04-01	6001
2008-07-01	5449
2008-10-01	5408
2009-01-01	5363
2009-04-01	6399
2009-07-01	6628
2009-10-01	8021
2010-01-01	9605
2010-04-01	8847
2010-07-01	10192
2010-10-01	10068
2011-01-01	11183
2011-04-01	11289
2011-07-01	10879
2011-10-01	11336
2012-01-01	13016
2012-04-01	11930
2012-07-01	12056
2012-10-01	12345
2013-01-01	11425
2013-04-01	11513
2013-07-01	11653
2013-10-01	11745
2014-01-01	12435
2014-04-01	11704
2014-07-01	11355
2014-10-01	12425
2015-01-01	10359
2015-04-01	10545
2015-07-01	10542
2015-10-01	11886
2016-01-01	11027
2016-04-01	10897
2016-07-01	11426
2016-10-01	11113
2017-01-01	11190
2017-04-01	13037
2017-07-01	12882
2017-10-01	14323
2018-01-01	12852
2018-04-01	12256