Quarter	Millions of US Dollars
2004-01-01	4447
2004-04-01	4566
2004-07-01	4646
2004-10-01	5002
2005-01-01	4964
2005-04-01	4669
2005-07-01	4632
2005-10-01	4570
2006-01-01	4728
2006-04-01	4694
2006-07-01	4727
2006-10-01	4867
2007-01-01	5041
2007-04-01	5185
2007-07-01	5449
2007-10-01	5747
2008-01-01	6106
2008-04-01	6357
2008-07-01	5958
2008-10-01	5822
2009-01-01	5598
2009-04-01	6305
2009-07-01	6711
2009-10-01	6680
2010-01-01	6454
2010-04-01	6106
2010-07-01	6934
2010-10-01	6755
2011-01-01	7370
2011-04-01	7679
2011-07-01	7161
2011-10-01	7026
2012-01-01	7548
2012-04-01	7343
2012-07-01	7341
2012-10-01	7651
2013-01-01	7705
2013-04-01	8424
2013-07-01	9020
2013-10-01	8785
2014-01-01	9631
2014-04-01	9845
2014-07-01	9383
2014-10-01	8973
2015-01-01	8348
2015-04-01	9044
2015-07-01	9663
2015-10-01	9338
2016-01-01	10075
2016-04-01	9914
2016-07-01	10035
2016-10-01	9438
2017-01-01	9724
2017-04-01	10425
2017-07-01	11301
2017-10-01	11179
2018-01-01	11930