Quarter	Millions of US Dollars
2000-01-01	2882
2000-04-01	2882
2000-07-01	3487
2000-10-01	3487
2001-01-01	3487
2001-04-01	2914
2001-07-01	3374
2001-10-01	4061
2002-01-01	4435
2002-04-01	4660
2002-07-01	5263
2002-10-01	7769
2003-01-01	8530
2003-04-01	8336
2003-07-01	9279
2003-10-01	11079
2004-01-01	12227
2004-04-01	12389
2004-07-01	13596
2004-10-01	14891
2005-01-01	15253
2005-04-01	18250
2005-07-01	27169
2005-10-01	39429
2006-01-01	51012
2006-04-01	61538
2006-07-01	65149
2006-10-01	72854
2007-01-01	73463
2007-04-01	78246
2007-07-01	88988
2007-10-01	108833
2008-01-01	125161
2008-04-01	132350
2008-07-01	150916
2008-10-01	193897
2009-01-01	223925
2009-04-01	277095
2009-07-01	306068
2009-10-01	359821
2010-01-01	396894
2010-04-01	448083
2010-07-01	497708
2010-10-01	527315
2011-01-01	575634
2011-04-01	606778
2011-07-01	628267
2011-10-01	778594
2012-01-01	796093
2012-04-01	958238
2012-07-01	1115073
2012-10-01	1247231
2013-01-01	1313241
2013-04-01	1422901
2013-07-01	1476812
2013-10-01	1539462
2014-01-01	1541907
2014-04-01	1710039
2014-07-01	1808193
2014-10-01	1872340
2015-01-01	1944198
2015-04-01	2015927
2015-07-01	2099573
2015-10-01	2225406
2016-01-01	2442537
2016-04-01	2467489
2016-07-01	2579115
2016-10-01	2522576
2017-01-01	2581844
2017-04-01	2601679
2017-07-01	2723461
2017-10-01	2816007
2018-01-01	3034882