Quarter	Millions of US Dollars
2001-10-01	90
2002-10-01	149
2003-10-01	196
2004-10-01	1206
2005-10-01	1063
2006-10-01	654
2007-01-01	666
2007-04-01	681
2007-07-01	680
2007-10-01	708
2008-01-01	764
2008-04-01	768
2008-07-01	669
2008-10-01	652
2009-01-01	629
2009-04-01	663
2009-07-01	5
2009-10-01	16
2010-01-01	16
2010-04-01	17
2010-07-01	49
2010-10-01	48
2011-01-01	29
2011-04-01	33
2011-07-01	164
2011-10-01	191
2012-01-01	190
2012-04-01	183
2012-07-01	178
2012-10-01	223
2013-01-01	219
2013-04-01	225
2013-07-01	226
2013-10-01	242
2014-01-01	243
2014-04-01	243
2014-07-01	219
2014-10-01	221
2015-01-01	197
2015-04-01	192
2015-07-01	190
2015-10-01	197
2016-01-01	209
2016-04-01	204
2016-07-01	203
2016-10-01	201
2017-01-01	207
2017-04-01	223
2017-07-01	131
2017-10-01	145
2018-01-01	140