Quarter	Millions of US Dollars
2005-10-01	885
2006-01-01	1164
2006-04-01	1223
2006-07-01	1218
2006-10-01	1267
2007-01-01	1281
2007-04-01	1299
2007-07-01	1364
2007-10-01	1416
2008-01-01	1521
2008-04-01	1516
2008-07-01	1376
2008-10-01	1339
2009-01-01	1280
2009-04-01	1360
2009-07-01	1409
2009-10-01	1386
2010-01-01	1297
2010-04-01	2101
2010-07-01	2337
2010-10-01	2288
2011-01-01	2432
2011-04-01	2474
2011-07-01	2379
2011-10-01	2280
2012-01-01	2353
2012-04-01	2218
2012-07-01	2278
2012-10-01	2325
2013-01-01	2192
2013-04-01	2701
2013-07-01	2782
2013-10-01	2837
2014-01-01	2836
2014-04-01	2811
2014-07-01	2606
2014-10-01	2521
2015-01-01	2257
2015-04-01	2339
2015-07-01	2342
2015-10-01	1465
2016-01-01	1523
2016-04-01	2323
2016-07-01	2334
2016-10-01	2215
2017-01-01	2244
2017-04-01	1526
2017-07-01	1572
2017-10-01	1594
2018-01-01	1632
2018-04-01	1355