Quarter	Millions of US Dollars
1994-01-01	46
1994-04-01	302
1994-07-01	318
1994-10-01	318
1995-01-01	291
1995-04-01	318
1995-07-01	344
1995-10-01	308
1996-01-01	295
1996-04-01	273
1996-07-01	284
1996-10-01	296
1997-01-01	304
1997-04-01	635
1997-07-01	597
1997-10-01	547
1998-01-01	535
1998-04-01	540
1998-07-01	949
1998-10-01	893
1999-01-01	863
1999-04-01	1102
1999-07-01	1164
1999-10-01	1132
2000-01-01	1076
2000-04-01	1054
2000-07-01	1016
2000-10-01	989
2001-01-01	1022
2001-04-01	1003
2001-07-01	1007
2001-10-01	962
2002-01-01	1449
2002-04-01	1305
2002-07-01	1360
2002-10-01	1270
2003-01-01	1286
2003-04-01	1349
2003-07-01	1496
2003-10-01	1733
2004-01-01	1714
2004-04-01	1884
2004-07-01	2243
2004-10-01	2608
2005-01-01	2493
2005-04-01	2080
2005-07-01	2085
2005-10-01	1977
2006-01-01	2028
2006-04-01	1774
2006-07-01	1767
2006-10-01	1838
2007-01-01	1859
2007-04-01	1885
2007-07-01	1979
2007-10-01	2054
2008-01-01	2207
2008-04-01	2200
2008-07-01	1788
2008-10-01	1990
2009-01-01	1553
2009-04-01	4218
2009-07-01	4150
2009-10-01	4578
2010-01-01	5140
2010-04-01	5003
2010-07-01	5422
2010-10-01	6407
2011-01-01	7227
2011-04-01	7680
2011-07-01	7250
2011-10-01	7157
2012-01-01	6124
2012-04-01	5223
2012-07-01	110
2012-10-01	5390
2013-01-01	5237
2013-04-01	3846
2013-07-01	3856
2013-10-01	761
2014-01-01	3819
2014-04-01	5026
2014-07-01	3769
2014-10-01	3673
2015-01-01	3212
2015-04-01	4459
2015-07-01	4464
2015-10-01	3888
2016-01-01	3901
2016-04-01	3804
2016-07-01	4940
2016-10-01	4666
2017-01-01	4732
2017-04-01	5498
2017-07-01	5655
2017-10-01	5741
2018-01-01	5898
2018-04-01	5581