Quarter	Millions of US Dollars
2003-10-01	5795
2004-01-01	4539
2004-04-01	6260
2004-07-01	7262
2004-10-01	7524
2005-01-01	8855
2005-04-01	11019
2005-07-01	12278
2005-10-01	13800
2006-01-01	14500
2006-04-01	14782
2006-07-01	16555
2006-10-01	16370
2007-01-01	15889
2007-04-01	15946
2007-07-01	17518
2007-10-01	14245
2008-01-01	17975
2008-04-01	15506
2008-07-01	18036
2008-10-01	12022
2009-01-01	9701
2009-04-01	15850
2009-07-01	21361
2009-10-01	20998
2010-01-01	33187
2010-04-01	27884
2010-07-01	34386
2010-10-01	31457
2011-01-01	40672
2011-04-01	44914
2011-07-01	34785
2011-10-01	35519
2012-01-01	38484
2012-04-01	39360
2012-07-01	44878
2012-10-01	43469
2013-01-01	49572
2013-04-01	51344
2013-07-01	48245
2013-10-01	51132
2014-01-01	45185
2014-04-01	45511
2014-07-01	45310
2014-10-01	35180
2015-01-01	35331
2015-04-01	30595
2015-07-01	34932
2015-10-01	32217
2016-01-01	33540
2016-04-01	28657
2016-07-01	29927
2016-10-01	31958
2017-01-01	31874
2017-04-01	34602
2017-07-01	39236
2017-10-01	49185
2018-01-01	51236