Quarter	Millions of US Dollars
2004-01-01	261
2004-04-01	259
2004-07-01	255
2004-10-01	269
2005-01-01	262
2005-04-01	192
2005-07-01	192
2005-10-01	189
2006-01-01	193
2006-04-01	122
2006-07-01	135
2006-10-01	138
2007-01-01	218
2007-04-01	222
2007-07-01	231
2007-10-01	238
2008-01-01	247
2008-04-01	246
2008-07-01	270
2008-10-01	264
2009-01-01	254
2009-04-01	379
2009-07-01	396
2009-10-01	391
2010-01-01	400
2010-04-01	375
2010-07-01	411
2010-10-01	432
2011-01-01	457
2011-04-01	472
2011-07-01	502
2011-10-01	482
2012-01-01	814
2012-04-01	816
2012-07-01	837
2012-10-01	1314
2013-01-01	1136
2013-04-01	1615
2013-07-01	1814
2013-10-01	1727
2014-01-01	2225
2014-04-01	2073
2014-07-01	2400
2014-10-01	2472
2015-01-01	2304
2015-04-01	2720
2015-07-01	3305
2015-10-01	3216
2016-01-01	3371
2016-04-01	3315
2016-07-01	3247
2016-10-01	3036
2017-01-01	3026
2017-04-01	3343
2017-07-01	3994
2017-10-01	4002
2018-01-01	4468