Quarter	Millions of US Dollars
2010-04-01	16439
2010-07-01	21007
2010-10-01	15925
2011-01-01	24523
2011-04-01	26627
2011-07-01	20785
2011-10-01	15773
2012-01-01	18679
2012-04-01	18599
2012-07-01	18427
2012-10-01	17111
2013-01-01	19560
2013-04-01	20135
2013-07-01	19950
2013-10-01	24235
2014-01-01	23009
2014-04-01	20613
2014-07-01	69
2014-10-01	67
2015-01-01	67
2015-04-01	67
2015-07-01	71
2015-10-01	22
2016-01-01	13
2016-04-01	17
2016-07-01	13
2016-10-01	93
2017-01-01	95
2017-04-01	104
2017-07-01	113
2017-10-01	29
2018-01-01	28