Quarter	Millions of US Dollars
2001-10-01	163
2002-10-01	516
2003-10-01	861
2004-10-01	967
2005-10-01	853
2006-10-01	1238
2007-01-01	1314
2007-04-01	1412
2007-07-01	1899
2007-10-01	1892
2008-01-01	2145
2008-04-01	2027
2008-07-01	1909
2008-10-01	1820
2009-01-01	1700
2009-04-01	1816
2009-07-01	1850
2009-10-01	2182
2010-01-01	2036
2010-04-01	1851
2010-07-01	2039
2010-10-01	1761
2011-01-01	2060
2011-04-01	2002
2011-07-01	1937
2011-10-01	1882
2012-01-01	1963
2012-04-01	2237
2012-07-01	2275
2012-10-01	3521
2013-01-01	3467
2013-04-01	3529
2013-07-01	3619
2013-10-01	3559
2014-01-01	3566
2014-04-01	2723
2014-07-01	2537
2014-10-01	2561
2015-01-01	2360
2015-04-01	2403
2015-07-01	2457
2015-10-01	2576
2016-01-01	2675
2016-04-01	2616
2016-07-01	2925
2016-10-01	2789
2017-01-01	2831
2017-04-01	2776
2017-07-01	2463
2017-10-01	2404
2018-01-01	2452