Quarterly Percent
1978-03-31 6.125
1978-06-30 10.13
1978-09-30 8.69
1978-12-31 11.125
1979-03-31 12.94
1979-06-30 14.315
1979-09-30 13.875
1979-12-31 17.19
1980-03-31 18
1980-06-30 18.44
1980-09-30 16.315
1980-12-31 14.435
1981-03-31 12.255
1981-06-30 11.94
1981-09-30 15.94
1981-12-31 14.815
1982-03-31 13.315
1982-06-30 12.815
1982-09-30 11.19
1982-12-31 10.315
1983-03-31 10.875
1983-06-30 9.625
1983-09-30 10.125
1983-12-31 9.315
1984-03-31 8.935
1984-06-30 8.695
1984-09-30 10.94
1984-12-31 9.69
1985-03-31 14.255
1985-06-30 12.815
1985-09-30 11.875
1985-12-31 11.69
1986-03-31 12.19
1986-06-30 10.255
1986-09-30 9.505
1986-12-31 11.19
1987-03-31 10.065
1987-06-30 9.19
1987-09-30 10.125
1987-12-31 8.595
1988-03-31 8.69
1988-06-30 8.565
1988-09-30 11.875
1988-12-31 12.94
1989-03-31 12.78
1989-06-30 13.91
1989-09-30 13.815
1989-12-31 14.755
1990-03-31 14.875
1990-06-30 15
1990-09-30 14.94
1990-12-31 14.315
1991-03-31 12.78
1991-06-30 11.625
1991-09-30 10.78
1991-12-31 10.44
1992-03-31 10.16
1992-06-30 10.22
1992-09-30 9.19
1992-12-31 6.125
1993-03-31 5.78
1993-06-30 6.13
1993-09-30 6.19
1993-12-31 5.28
1994-03-31 4.66
1994-06-30 4.97
1994-09-30 5.095
1994-12-31 5.315
1995-03-31 6.22
1995-06-30 6.28
1995-09-30 6.735
1995-12-31 6.41
1996-03-31 6.03
1996-06-30 5.72
1996-09-30 5.845
1996-12-31 6.06
1997-03-31 6.03
1997-06-30 6.47
1997-09-30 7.045
1997-12-31 7.345
1998-03-31 7.47
1998-06-30 7.4063
1998-09-30 7.44
1998-12-31 6.345
1999-03-31 5.375
1999-06-30 5
1999-09-30 5.315
1999-12-31 3.6875
2000-03-31 5.875
2000-06-30 5.7813
2000-09-30 6.0313
2000-12-31 5.2188
2001-03-31 6.2813
2001-06-30 5
2001-09-30 5.125
2001-12-31 4.4688
2002-03-31 3.4688
2002-06-30 3.7188
2002-09-30 3.7188
2002-12-31 4.2813
2003-03-31 3.9063
2003-06-30 3.625
2003-09-30 3.5
2003-12-31 3.6875
2004-03-31 3.9063
2004-06-30 4.5938
2004-09-30 4.7656
2004-12-31 4.755
2005-03-31 4.775
2005-06-30 4.79
2005-09-30 4.51
2005-12-31 4.715
2006-03-31 4.59
2006-06-30 4.615
2006-09-30 4.895
2006-12-31 5.23
2007-03-31 5.335
2007-06-30 6
2007-09-30 5.95
2007-12-31 5.8
2008-03-31 5.475
2008-06-30 5.13
2008-09-30 5.85
2008-12-31 1.75
2009-03-31 0.65
2009-06-30 0.525
2009-09-30 0.515
2009-12-31 0.5
2010-03-31 0.475
2010-06-30 0.535
2010-09-30 0.535
2010-12-31 0.575
2011-03-31 0.55
2011-06-30 0.625
2011-09-30 0.65
2011-12-31 0.65
2012-03-31 0.6
2012-06-30 0.56
2012-09-30 0.475
2012-12-31 0.45
2013-03-31 0.475
2013-06-30 0.475
2013-09-30 0.475
2013-12-31 0.475
2014-03-31 0.475
2014-06-30 0.475
2014-09-30 0.45
2014-12-31 0.45
2015-03-31 0.45
2015-06-30 0.45
2015-09-30 0.425
2015-12-31 0.425
2016-03-31 0.45
2016-06-30 0.45
2016-09-30 0.235
2016-12-31 0.24
2017-03-31 0.23
2017-06-30 0.23
2017-09-30 0.24