Quarter	Millions of US Dollars
2008-01-01	193
2008-04-01	193
2008-07-01	192
2008-10-01	184
2009-01-01	228
2009-04-01	247
2009-07-01	263
2009-10-01	295
2010-01-01	266
2010-04-01	237
2010-07-01	268
2010-10-01	288
2011-01-01	237
2011-04-01	238
2011-07-01	235
2011-10-01	234
2012-01-01	242
2012-04-01	225
2012-07-01	238
2012-10-01	232
2013-01-01	222
2013-04-01	224
2013-07-01	240
2013-10-01	251
2014-01-01	250
2014-04-01	242
2014-07-01	165
2014-10-01	206
2015-01-01	182
2015-04-01	187
2015-07-01	187
2015-10-01	155
2016-01-01	158
2016-04-01	148
2016-07-01	144
2016-10-01	148
2017-01-01	149
2017-04-01	159
2017-07-01	158
2017-10-01	176
2018-01-01	181