Quarter	Millions of US Dollars
2004-10-01	0
2005-01-01	0
2005-04-01	0
2005-07-01	0
2005-10-01	10
2006-01-01	10
2006-04-01	8
2006-07-01	75
2006-10-01	80
2007-01-01	82
2007-04-01	76
2007-07-01	186
2007-10-01	300
2008-01-01	336
2008-04-01	375
2008-07-01	402
2008-10-01	363
2009-01-01	261
2009-04-01	235
2009-07-01	276
2009-10-01	274
2010-01-01	322
2010-04-01	386
2010-07-01	427
2010-10-01	704
2011-01-01	1482
2011-04-01	1657
2011-07-01	1574
2011-10-01	2290
2012-01-01	3211
2012-04-01	4336
2012-07-01	4212
2012-10-01	4593
2013-01-01	5178
2013-04-01	5122
2013-07-01	4878
2013-10-01	4641
2014-01-01	4527
2014-04-01	4389
2014-07-01	4470
2014-10-01	5034
2015-01-01	4073
2015-04-01	3981
2015-07-01	4105
2015-10-01	4148
2016-01-01	4593
2016-04-01	4476
2016-07-01	4085
2016-10-01	3226
2017-01-01	2967
2017-04-01	3217
2017-07-01	4275
2017-10-01	4589
2018-01-01	4386