Quarter	Millions of US Dollars
1993-07-01	5
1993-10-01	4
1994-01-01	4
1994-04-01	5
1994-07-01	5
1994-10-01	5
1995-01-01	5
1995-04-01	5
1995-07-01	5
1995-10-01	5
1996-01-01	5
1996-04-01	5
1996-07-01	5
1996-10-01	5
1997-01-01	5
1997-04-01	5
1997-07-01	5
1997-10-01	5
1998-01-01	5
1998-04-01	5
1998-07-01	5
1998-10-01	5
1999-01-01	5
1999-04-01	5
1999-07-01	5
1999-10-01	5
2000-01-01	5
2000-04-01	5
2000-07-01	4
2000-10-01	4
2001-01-01	4
2001-04-01	4
2001-07-01	4
2001-10-01	4
2002-01-01	4
2002-04-01	5
2002-07-01	5
2002-10-01	5
2003-01-01	5
2003-04-01	5
2003-07-01	5
2003-10-01	5
2004-01-01	6
2004-04-01	5
2004-07-01	5
2004-10-01	6
2005-01-01	6
2005-04-01	5
2005-07-01	5
2005-10-01	5
2006-01-01	5
2006-04-01	6
2006-07-01	6
2006-10-01	138
2007-01-01	139
2007-04-01	141
2007-07-01	148
2007-10-01	153
2008-01-01	164
2008-04-01	164
2008-07-01	241
2008-10-01	234
2009-01-01	224
2009-04-01	303
2009-07-01	314
2009-10-01	309
2010-01-01	289
2010-04-01	263
2010-07-01	293
2010-10-01	287
2011-01-01	305
2011-04-01	310
2011-07-01	290
2011-10-01	148
2012-01-01	153
2012-04-01	144
2012-07-01	148
2012-10-01	151
2013-01-01	147
2013-04-01	150
2013-07-01	155
2013-10-01	1399
2014-01-01	1399
2014-04-01	1386
2014-07-01	1277
2014-10-01	1232
2015-01-01	1092
2015-04-01	1136
2015-07-01	1064
2015-10-01	1039
2016-01-01	1086
2016-04-01	1010
2016-07-01	1633
2016-10-01	1543
2017-01-01	1567
2017-04-01	1682
2017-07-01	1740
2017-10-01	1768
2018-01-01	1816
2018-04-01	2185