Quarter	Millions of US Dollars
2002-04-01	41028
2002-07-01	36236
2002-10-01	44862
2003-01-01	53768
2003-04-01	47733
2003-07-01	53974
2003-10-01	49065
2004-01-01	55162
2004-04-01	58578
2004-07-01	59855
2004-10-01	76413
2005-01-01	86453
2005-04-01	79753
2005-07-01	76423
2005-10-01	70695
2006-01-01	68656
2006-04-01	67728
2006-07-01	74152
2006-10-01	73925
2007-01-01	72403
2007-04-01	73666
2007-07-01	64776
2007-10-01	66217
2008-01-01	64007
2008-04-01	62258
2008-07-01	54402
2008-10-01	47682
2009-01-01	63540
2009-04-01	86478
2009-07-01	82214
2009-10-01	74748
2010-01-01	85565
2010-04-01	76910
2010-07-01	74083
2010-10-01	72182
2011-01-01	74590
2011-04-01	55281
2011-07-01	64600
2011-10-01	70679
2012-01-01	73449
2012-04-01	69939
2012-07-01	69513
2012-10-01	74469
2013-01-01	74501
2013-04-01	74442
2013-07-01	79674
2013-10-01	81523
2014-01-01	83985
2014-04-01	90831
2014-07-01	88763
2014-10-01	93584
2015-01-01	95945
2015-04-01	96742
2015-07-01	85719
2015-10-01	86028
2016-01-01	89577
2016-04-01	84612
2016-07-01	87885
2016-10-01	79795
2017-01-01	84133
2017-04-01	81385
2017-07-01	83894
2017-10-01	94942
2018-01-01	94592