Quarter	Millions of US Dollars
2007-10-01	821
2008-01-01	927
2008-04-01	882
2008-07-01	785
2008-10-01	761
2009-01-01	666
2009-04-01	849
2009-07-01	1111
2009-10-01	1045
2010-01-01	1136
2010-04-01	1148
2010-07-01	1228
2010-10-01	1892
2011-01-01	1932
2011-04-01	2044
2011-07-01	1905
2011-10-01	1856
2012-01-01	2024
2012-04-01	2000
2012-07-01	1955
2012-10-01	1988
2013-01-01	1918
2013-04-01	1943
2013-07-01	2363
2013-10-01	2348
2014-01-01	2302
2014-04-01	2405
2014-07-01	2231
2014-10-01	1891
2015-01-01	1757
2015-04-01	1886
2015-07-01	1562
2015-10-01	1365
2016-01-01	1554
2016-04-01	1611
2016-07-01	1631
2016-10-01	1239
2017-01-01	1575
2017-04-01	1723
2017-07-01	1780
2017-10-01	1674
2018-01-01	1797