Quarter	Millions of US Dollars
2009-04-01	165129
2009-07-01	165635
2009-10-01	166164
2010-01-01	186582
2010-04-01	183996
2010-07-01	193582
2010-10-01	196792
2011-01-01	221520
2011-04-01	236406
2011-07-01	216965
2011-10-01	218991
2012-01-01	255011
2012-04-01	245501
2012-07-01	272609
2012-10-01	272466
2013-01-01	304796
2013-04-01	299316
2013-07-01	305960
2013-10-01	311854
2014-01-01	330157
2014-04-01	343206
2014-07-01	341618
2014-10-01	316151
2015-01-01	314957
2015-04-01	313069
2015-07-01	297063
2015-10-01	297168
2016-01-01	307554
2016-04-01	270981
2016-07-01	267252
2016-10-01	253086
2017-01-01	290216
2017-04-01	304874
2017-07-01	312227
2017-10-01	283160
2018-01-01	315642