Quarter	Millions of US Dollars
2000-10-01	115960
2001-01-01	118521
2001-04-01	124598
2001-07-01	130121
2001-10-01	138605
2002-01-01	162571
2002-04-01	181910
2002-07-01	194829
2002-10-01	202480
2003-01-01	206709
2003-04-01	223502
2003-07-01	228562
2003-10-01	260972
2004-01-01	264374
2004-04-01	277025
2004-07-01	295939
2004-10-01	300297
2005-01-01	299790
2005-04-01	305515
2005-07-01	326280
2005-10-01	341899
2006-01-01	341226
2006-04-01	338847
2006-07-01	357018
2006-10-01	378756
2007-01-01	383567
2007-04-01	401152
2007-07-01	505798
2007-10-01	643614
2008-01-01	670035
2008-04-01	699949
2008-07-01	704745
2008-10-01	721108
2009-01-01	723626
2009-04-01	789057
2009-07-01	834991
2009-10-01	844754
2010-01-01	841360
2010-04-01	898688
2010-07-01	960045
2010-10-01	1012829
2011-01-01	1021749
2011-04-01	1077856
2011-07-01	1143394
2011-10-01	1205275
2012-01-01	1212239
2012-04-01	1211454
2012-07-01	1292206
2012-10-01	1327081
2013-01-01	1358119
2013-04-01	1437902
2013-07-01	1515805
2013-10-01	1578479
2014-01-01	1531553
2014-04-01	1577496
2014-07-01	1697711
2014-10-01	1786726
2015-01-01	1762183
2015-04-01	1952768
2015-07-01	2217501
2015-10-01	2447105
2016-01-01	2593420
2016-04-01	2990946
2016-07-01	3282088
2016-10-01	3332394
2017-01-01	3412301
2017-04-01	3753172
2017-07-01	4129741
2017-10-01	4443968
2018-01-01	4646791