Quarter	Millions of US Dollars
2004-10-01	0
2005-01-01	0
2005-04-01	0
2005-07-01	0
2005-10-01	0
2006-01-01	0
2006-04-01	0
2006-07-01	0
2006-10-01	0
2007-01-01	0
2007-04-01	0
2007-07-01	442
2007-10-01	852
2008-01-01	0
2008-04-01	0
2008-07-01	0
2008-10-01	0
2009-01-01	0
2009-04-01	33
2009-07-01	36
2009-10-01	71
2010-01-01	159
2010-04-01	148
2010-07-01	394
2010-10-01	1034
2011-01-01	2200
2011-04-01	4839
2011-07-01	5200
2011-10-01	5015
2012-01-01	7166
2012-04-01	9020
2012-07-01	10031
2012-10-01	10396
2013-01-01	10690
2013-04-01	9750
2013-07-01	9485
2013-10-01	10400
2014-01-01	10655
2014-04-01	11695
2014-07-01	11905
2014-10-01	11317
2015-01-01	10140
2015-04-01	9760
2015-07-01	8618
2015-10-01	9410
2016-01-01	10292
2016-04-01	9912
2016-07-01	9697
2016-10-01	8705
2017-01-01	9327
2017-04-01	10028
2017-07-01	12053
2017-10-01	13085
2018-01-01	14840