Quarter	Percent
1993-01-01	11.92
1993-04-01	12.09
1993-07-01	8.56
1993-10-01	5.47
1994-01-01	7.77
1994-04-01	5.88
1994-07-01	8.41
1994-10-01	10.75
1995-01-01	9.87
1995-04-01	10.52
1995-07-01	10.94
1995-10-01	10.83
1996-01-01	11.27
1996-04-01	11.15
1996-07-01	11.87
1996-10-01	12.44
1997-01-01	12.46
1997-04-01	31.56
1997-07-01	13.49
1997-10-01	12.55
1998-01-01	13.91
1998-04-01	13.63
1998-07-01	14.05
1998-10-01	10.84
1999-01-01	7.75
1999-04-01	6.84
1999-07-01	5.99
1999-10-01	5.21
2000-01-01	5.25
2000-04-01	5.27
2000-07-01	5.26
2000-10-01	5.23
2001-01-01	4.98
2001-04-01	4.89
2001-07-01	5.01
2001-10-01	4.63
2002-01-01	4.26
2002-04-01	3.75
2002-07-01	3.02
2002-10-01	2.75
2003-01-01	2.50
2003-04-01	2.47
2003-07-01	2.00
2003-10-01	1.98
2004-01-01	2.00
2004-04-01	2.05
2004-07-01	2.39
2004-10-01	2.49
2005-01-01	2.21
2005-04-01	1.75
2005-07-01	1.75
2005-10-01	2.00
2006-01-01	1.99
2006-04-01	1.97
2006-07-01	2.05
2006-10-01	2.48
2007-01-01	2.49
2007-04-01	2.70
2007-07-01	3.25
2007-10-01	3.40
2008-01-01	3.58
2008-04-01	3.56
2008-07-01	3.45
2008-10-01	2.32
2009-01-01	1.74
2009-04-01	1.55
2009-07-01	1.37
2009-10-01	1.01
2010-01-01	1.02
2010-04-01	0.76
2010-07-01	0.84
2010-10-01	0.65
2011-01-01	0.68
2011-04-01	0.71
2011-07-01	0.72
2011-10-01	0.63
2012-01-01	0.73
2012-04-01	0.74
2012-07-01	0.57
2012-10-01	0.20
2013-01-01	0.18
2013-04-01	0.18
2013-07-01	0.18
2013-10-01	0.15
2014-01-01	0.15
2014-04-01	0.15
2014-07-01	0.15
2014-10-01	0.16
2015-01-01	0.15
2015-04-01	0.15
2015-07-01	0.14
2015-10-01	0.13
2016-01-01	0.13
2016-04-01	0.13
2016-07-01	0.13
2016-10-01	0.12
2017-01-01	0.12
2017-04-01	0.12
2017-07-01	0.28
2017-10-01	0.50
2018-01-01	0.75
2018-04-01	0.76
2018-07-01	1.26