Quarter	Millions of US Dollars
2002-04-01	106239
2002-07-01	113159
2002-10-01	117929
2003-01-01	112589
2003-04-01	130537
2003-07-01	137565
2003-10-01	136156
2004-01-01	145874
2004-04-01	149527
2004-07-01	150480
2004-10-01	179280
2005-01-01	189510
2005-04-01	192456
2005-07-01	193806
2005-10-01	214135
2006-01-01	238342
2006-04-01	263197
2006-07-01	273654
2006-10-01	283372
2007-01-01	300219
2007-04-01	318475
2007-07-01	337800
2007-10-01	336832
2008-01-01	320320
2008-04-01	314109
2008-07-01	277656
2008-10-01	251871
2009-01-01	231778
2009-04-01	248119
2009-07-01	274193
2009-10-01	284066
2010-01-01	283442
2010-04-01	268874
2010-07-01	286325
2010-10-01	287526
2011-01-01	292020
2011-04-01	321277
2011-07-01	278814
2011-10-01	276318
2012-01-01	282216
2012-04-01	275589
2012-07-01	282505
2012-10-01	297477
2013-01-01	286950
2013-04-01	280853
2013-07-01	303139
2013-10-01	314250
2014-01-01	313208
2014-04-01	329361
2014-07-01	322899
2014-10-01	357981
2015-01-01	357977
2015-04-01	359758
2015-07-01	348412
2015-10-01	351881
2016-01-01	369049
2016-04-01	370514
2016-07-01	392117
2016-10-01	351333
2017-01-01	383809
2017-04-01	386352
2017-07-01	387600
2017-10-01	425695
2018-01-01	435594