Quarterly Percent
1978-03-31 6.6875
1978-06-30 10.0938
1978-09-30 9.625
1978-12-31 12.5
1979-03-31 11.7813
1979-06-30 13.9375
1979-09-30 14.125
1979-12-31 16.875
1980-03-31 18.375
1980-06-30 16.9375
1980-09-30 15.6407
1980-12-31 14.7813
1981-03-31 12.4375
1981-06-30 12.5
1981-09-30 16.7188
1981-12-31 15.625
1982-03-31 13.375
1982-06-30 12.9375
1982-09-30 10.375
1982-12-31 10.25
1983-03-31 10.6875
1983-06-30 9.6876
1983-09-30 9.4688
1983-12-31 9.297
1984-03-31 8.844
1984-06-30 9.375
1984-09-30 10.5938
1984-12-31 9.8125
1985-03-31 13
1985-06-30 12.375
1985-09-30 11.375
1985-12-31 11.8125
1986-03-31 11.25
1986-06-30 9.66
1986-09-30 11
1986-12-31 11.13
1987-03-31 9.81
1987-06-30 9.06
1987-09-30 10.125
1987-12-31 8.75
1988-03-31 8.565
1988-06-30 9.75
1988-09-30 11.815
1988-12-31 13
1989-03-31 12.94
1989-06-30 14
1989-09-30 14.315
1989-12-31 15.06
1990-03-31 15.16
1990-06-30 14.91
1990-09-30 14.91
1990-12-31 13.845
1991-03-31 12.265
1991-06-30 11.16
1991-09-30 10.22
1991-12-31 10.845
1992-03-31 10.69
1992-06-30 9.985
1992-09-30 8.845
1992-12-31 6.91
1993-03-31 5.845
1993-06-30 5.795
1993-09-30 5.845
1993-12-31 5.235
1994-03-31 5.22
1994-06-30 5.075
1994-09-30 5.69
1994-12-31 6.425
1995-03-31 6.545
1995-06-30 6.78
1995-09-30 6.72
1995-12-31 6.455
1996-03-31 6.01
1996-06-30 5.705
1996-09-30 5.845
1996-12-31 6.41
1997-03-31 6.265
1997-06-30 6.795
1997-09-30 7.2031
1997-12-31 7.515
1998-03-31 7.4844
1998-06-30 7.75
1998-09-30 7.22
1998-12-31 6.125
1999-03-31 5.175
1999-06-30 5.045
1999-09-30 5.41
1999-12-31 5.9063
2000-03-31 6.1407
2000-06-30 6.0938
2000-09-30 6.0626
2000-12-31 5.7813
2001-03-31 5.415
2001-06-30 5.18
2001-09-30 4.46
2001-12-31 4
2002-03-31 4.1
2002-06-30 4.06
2002-09-30 3.855
2002-12-31 3.92
2003-03-31 3.58
2003-06-30 3.555
2003-09-30 3.64
2003-12-31 3.965
2004-03-31 4.31
2004-06-30 4.76
2004-09-30 4.84
2004-12-31 4.8
2005-03-31 4.9
2005-06-30 4.71
2005-09-30 4.54
2005-12-31 4.59
2006-03-31 4.55
2006-06-30 4.72
2006-09-30 5.035
2006-12-31 5.275
2007-03-31 5.675
2007-06-30 6.075
2007-09-30 6.23
2007-12-31 5.95
2008-03-31 5.98
2008-06-30 5.91
2008-09-30 6.225
2008-12-31 2.775
2009-03-31 1.575
2009-06-30 1.075
2009-09-30 0.475
2009-12-31 0.575
2010-03-31 0.625
2010-06-30 0.775
2010-09-30 0.725
2010-12-31 0.825
2011-03-31 0.875
2011-06-30 0.875
2011-09-30 1.045
2011-12-31 1.175
2012-03-31 1.105
2012-06-30 0.965
2012-09-30 0.575
2012-12-31 0.575
2013-03-31 0.565
2013-06-30 0.525
2013-09-30 0.525
2013-12-31 0.575
2014-03-31 0.575
2014-06-30 0.575
2014-09-30 0.55
2014-12-31 0.55
2015-03-31 0.55
2015-06-30 0.55
2015-09-30 0.55
2015-12-31 0.65
2016-03-31 0.65
2016-06-30 0.55
2016-09-30 0.35
2016-12-31 0.35
2017-03-31 0.35
2017-06-30 0.35
2017-09-30 0.3
2017-12-31 0.5
2018-03-31 0.7
2018-06-30 0.65