Quarter	Millions of US Dollars
1999-10-01	1359
2000-01-01	210
2000-04-01	144
2000-07-01	230
2000-10-01	393
2001-01-01	534
2001-04-01	781
2001-07-01	1123
2001-10-01	1269
2002-01-01	245
2002-04-01	251
2002-07-01	318
2002-10-01	471
2003-01-01	274
2003-04-01	1
2003-07-01	682
2003-10-01	1700
2004-01-01	1
2004-04-01	2
2004-07-01	36
2004-10-01	94
2005-01-01	186
2005-04-01	210
2005-07-01	271
2005-10-01	254
2006-01-01	334
2006-04-01	417
2006-07-01	898
2006-10-01	1201
2007-01-01	476
2007-04-01	397
2007-07-01	877
2007-10-01	1382
2008-01-01	1410
2008-04-01	3197
2008-07-01	4102
2008-10-01	4539
2009-01-01	465
2009-04-01	7874
2009-07-01	10743
2009-10-01	31378
2010-01-01	22738
2010-04-01	16176
2010-07-01	13919
2010-10-01	3703
2011-01-01	4573
2011-04-01	2952
2011-07-01	2713
2011-10-01	1791
2012-01-01	3057
2012-04-01	1203
2012-07-01	1279
2012-10-01	506
2013-01-01	497
2013-04-01	631
2013-07-01	634
2013-10-01	647
2014-01-01	61
2014-04-01	638
2014-07-01	1349
2014-10-01	1134
2015-01-01	1219
2015-04-01	343
2015-07-01	638
2015-10-01	2057
2016-01-01	364
2016-04-01	453
2016-07-01	442
2016-10-01	457
2017-01-01	523
2017-04-01	547
2017-07-01	602
2017-10-01	702
2018-01-01	845