Quarter	Millions of US Dollars
2000-01-01	162219
2000-04-01	175447
2000-07-01	185057
2000-10-01	202324
2001-01-01	207689
2001-04-01	214707
2001-07-01	225637
2001-10-01	238346
2002-01-01	264077
2002-04-01	286142
2002-07-01	328422
2002-10-01	342305
2003-01-01	337539
2003-04-01	380520
2003-07-01	422245
2003-10-01	448449
2004-01-01	489699
2004-04-01	533180
2004-07-01	560655
2004-10-01	623718
2005-01-01	681172
2005-04-01	742192
2005-07-01	808761
2005-10-01	899244
2006-01-01	1011951
2006-04-01	1052592
2006-07-01	1121917
2006-10-01	1184124
2007-01-01	1323041
2007-04-01	1368417
2007-07-01	1530431
2007-10-01	1688210
2008-01-01	1888097
2008-04-01	2004221
2008-07-01	2112806
2008-10-01	2214015
2009-01-01	2191806
2009-04-01	2308734
2009-07-01	2414567
2009-10-01	2567082
2010-01-01	2648332
2010-04-01	2848409
2010-07-01	2990935
2010-10-01	3055116
2011-01-01	3066069
2011-04-01	3173119
2011-07-01	3245528
2011-10-01	3519173
2012-01-01	3593456
2012-04-01	3766770
2012-07-01	4075644
2012-10-01	4284884
2013-01-01	4456220
2013-04-01	4623322
2013-07-01	4761765
2013-10-01	4952940
2014-01-01	4968654
2014-04-01	5242115
2014-07-01	5552135
2014-10-01	5690446
2015-01-01	5966988
2015-04-01	6433513
2015-07-01	7037680
2015-10-01	7519398
2016-01-01	8102105
2016-04-01	8640471
2016-07-01	9181870
2016-10-01	9178680
2017-01-01	9626594
2017-04-01	10112508
2017-07-01	10850989
2017-10-01	11419001
2018-01-01	12108034