Quarter	Millions of US Dollars
2000-01-01	84350
2000-04-01	91054
2000-07-01	95229
2000-10-01	110623
2001-01-01	113184
2001-04-01	119261
2001-07-01	124784
2001-10-01	132574
2002-01-01	156541
2002-04-01	175879
2002-07-01	188798
2002-10-01	197257
2003-01-01	201485
2003-04-01	218279
2003-07-01	223339
2003-10-01	254133
2004-01-01	257535
2004-04-01	270186
2004-07-01	289100
2004-10-01	292095
2005-01-01	291589
2005-04-01	297314
2005-07-01	318078
2005-10-01	335487
2006-01-01	334814
2006-04-01	332436
2006-07-01	350607
2006-10-01	372169
2007-01-01	376980
2007-04-01	394565
2007-07-01	499211
2007-10-01	636664
2008-01-01	663086
2008-04-01	693000
2008-07-01	697796
2008-10-01	714544
2009-01-01	717062
2009-04-01	782493
2009-07-01	828427
2009-10-01	840946
2010-01-01	837553
2010-04-01	894880
2010-07-01	956237
2010-10-01	1009168
2011-01-01	1018088
2011-04-01	1074195
2011-07-01	1139733
2011-10-01	1202614
2012-01-01	1209578
2012-04-01	1208793
2012-07-01	1289544
2012-10-01	1324463
2013-01-01	1355501
2013-04-01	1435284
2013-07-01	1513187
2013-10-01	1576990
2014-01-01	1530065
2014-04-01	1576007
2014-07-01	1696222
2014-10-01	1728326
2015-01-01	1703583
2015-04-01	1893668
2015-07-01	2159901
2015-10-01	2382605
2016-01-01	2526820
2016-04-01	2923546
2016-07-01	3204788
2016-10-01	3250549
2017-01-01	3330901
2017-04-01	3663972
2017-07-01	4026341
2017-10-01	4326368
2018-01-01	4506491