Quarterly Percent
1978-03-31 8.285
1978-06-30 10.535
1978-09-30 10.19
1978-12-31 12.285
1979-03-31 11.095
1979-06-30 12.72
1979-09-30 13.19
1979-12-31 15.22
1980-03-31 17.38
1980-06-30 14.375
1980-09-30 14.25
1980-12-31 14.095
1981-03-31 12.315
1981-06-30 13.22
1981-09-30 16.345
1981-12-31 15.405
1982-03-31 13.625
1982-06-30 13.19
1982-09-30 10.565
1982-12-31 10.44
1983-03-31 10.81
1983-06-30 10.255
1983-09-30 9.94
1983-12-31 10
1984-03-31 9.5
1984-06-30 10.755
1984-09-30 10.94
1984-12-31 10.44
1985-03-31 11.94
1985-06-30 12.065
1985-09-30 11
1985-12-31 11.69
1986-03-31 10.44
1986-06-30 9.66
1986-09-30 11.375
1986-12-31 11.125
1987-03-31 9.625
1987-06-30 9.44
1987-09-30 10.565
1987-12-31 9.315
1988-03-31 9.125
1988-06-30 10.19
1988-09-30 11.815
1988-12-31 12.875
1989-03-31 12.91
1989-06-30 14.125
1989-09-30 14.375
1989-12-31 14.66
1990-03-31 15.53
1990-06-30 14.625
1990-09-30 14.5
1990-12-31 12.845
1991-03-31 11.565
1991-06-30 10.875
1991-09-30 10.095
1991-12-31 10.91
1992-03-31 11
1992-06-30 10.015
1992-09-30 8.47
1992-12-31 6.78
1993-03-31 5.845
1993-06-30 5.925
1993-09-30 5.72
1993-12-31 5.13
1994-03-31 5.735
1994-06-30 6.145
1994-09-30 7.395
1994-12-31 7.91
1995-03-31 7.53
1995-06-30 7.485
1995-09-30 6.795
1995-12-31 6.295
1996-03-31 6.375
1996-06-30 6.045
1996-09-30 6.19
1996-12-31 6.94
1997-03-31 6.925
1997-06-30 7.235
1997-09-30 7.5156
1997-12-31 7.61
1998-03-31 7.5156
1998-06-30 7.9531
1998-09-30 6.86
1998-12-31 5.515
1999-03-31 5.16
1999-06-30 5.41
1999-09-30 6.265
1999-12-31 6.625
2000-03-31 6.7344
2000-06-30 6.4376
2000-09-30 6.2188
2000-12-31 5.7188
2001-03-31 5.1876
2001-06-30 5.6407
2001-09-30 4.4532
2001-12-31 4.4063
2002-03-31 4.7813
2002-06-30 4.6094
2002-09-30 3.8906
2002-12-31 3.925
2003-03-31 3.515
2003-06-30 3.51
2003-09-30 3.97
2003-12-31 4.375
2004-03-31 4.7
2004-06-30 5.225
2004-09-30 5.03
2004-12-31 4.87
2005-03-31 5.05
2005-06-30 4.52
2005-09-30 4.47
2005-12-31 4.5
2006-03-31 4.725
2006-06-30 4.945
2006-09-30 5.235
2006-12-31 5.54
2007-03-31 5.82
2007-06-30 6.27
2007-09-30 6.14
2007-12-31 5.66
2008-03-31 5.795
2008-06-30 6.405
2008-09-30 6.425
2008-12-31 3.1
2009-03-31 2.05
2009-06-30 1.75
2009-09-30 1.15
2009-12-31 1.375
2010-03-31 1.305
2010-06-30 1.475
2010-09-30 1.475
2010-12-31 1.5
2011-03-31 1.575
2011-06-30 1.575
2011-09-30 1.77
2011-12-31 1.885
2012-03-31 1.89
2012-06-30 1.72
2012-09-30 1.31
2012-12-31 1.01
2013-03-31 0.87
2013-06-30 0.85
2013-09-30 0.865
2013-12-31 0.825
2014-03-31 0.87
2014-06-30 0.975
2014-09-30 1.085
2014-12-31 1.035
2015-03-31 1.05
2015-06-30 1.05
2015-09-30 1.065
2015-12-31 1.06
2016-03-31 1.015
2016-06-30 0.95
2016-09-30 0.74
2016-12-31 0.78
2017-03-31 0.69
2017-06-30 0.665
2017-09-30 0.705