Quarter	Millions of US Dollars
2001-10-01	55
2002-10-01	116
2003-10-01	117
2004-10-01	203
2005-10-01	171
2006-10-01	406
2007-01-01	444
2007-04-01	477
2007-07-01	494
2007-10-01	683
2008-01-01	811
2008-04-01	677
2008-07-01	631
2008-10-01	589
2009-01-01	550
2009-04-01	587
2009-07-01	646
2009-10-01	634
2010-01-01	628
2010-04-01	583
2010-07-01	652
2010-10-01	667
2011-01-01	722
2011-04-01	702
2011-07-01	699
2011-10-01	693
2012-01-01	717
2012-04-01	701
2012-07-01	685
2012-10-01	679
2013-01-01	650
2013-04-01	676
2013-07-01	700
2013-10-01	607
2014-01-01	589
2014-04-01	545
2014-07-01	503
2014-10-01	525
2015-01-01	464
2015-04-01	422
2015-07-01	474
2015-10-01	500
2016-01-01	534
2016-04-01	540
2016-07-01	778
2016-10-01	737
2017-01-01	763
2017-04-01	800
2017-07-01	872
2017-10-01	879
2018-01-01	909