Quarterly Percent
1978-03-31 7.44
1978-06-30 10.435
1978-09-30 10.065
1978-12-31 12.625
1979-03-31 11.535
1979-06-30 13.435
1979-09-30 13.94
1979-12-31 16.565
1980-03-31 18.095
1980-06-30 15.815
1980-09-30 15.22
1980-12-31 14.47
1981-03-31 12.44
1981-06-30 12.875
1981-09-30 16.935
1981-12-31 15.72
1982-03-31 13.625
1982-06-30 13.125
1982-09-30 10.565
1982-12-31 10.44
1983-03-31 10.875
1983-06-30 10.065
1983-09-30 9.75
1983-12-31 9.695
1984-03-31 9.255
1984-06-30 10.565
1984-09-30 10.81
1984-12-31 10.22
1985-03-31 12.375
1985-06-30 12.315
1985-09-30 11.19
1985-12-31 11.91
1986-03-31 10.78
1986-06-30 9.66
1986-09-30 11.375
1986-12-31 11.19
1987-03-31 9.75
1987-06-30 9.25
1987-09-30 10.375
1987-12-31 9.065
1988-03-31 8.815
1988-06-30 10
1988-09-30 11.785
1988-12-31 13.095
1989-03-31 13.03
1989-06-30 14.28
1989-09-30 14.66
1989-12-31 15.09
1990-03-31 15.41
1990-06-30 14.94
1990-09-30 14.91
1990-12-31 13.375
1991-03-31 11.91
1991-06-30 11.03
1991-09-30 10.16
1991-12-31 10.97
1992-03-31 10.985
1992-06-30 10.09
1992-09-30 8.81
1992-12-31 6.88
1993-03-31 5.88
1993-06-30 5.925
1993-09-30 5.83
1993-12-31 5.265
1994-03-31 5.47
1994-06-30 5.455
1994-09-30 6.44
1994-12-31 7.075
1995-03-31 6.97
1995-06-30 7.11
1995-09-30 6.78
1995-12-31 6.345
1996-03-31 6.13
1996-06-30 5.795
1996-09-30 5.955
1996-12-31 6.66
1997-03-31 6.56
1997-06-30 6.97
1997-09-30 7.3594
1997-12-31 7.595
1998-03-31 7.5313
1998-06-30 7.8594
1998-09-30 7.125
1998-12-31 5.825
1999-03-31 5.125
1999-06-30 5.16
1999-09-30 5.895
1999-12-31 6.2188
2000-03-31 6.3751
2000-06-30 6.2657
2000-09-30 6.2032
2000-12-31 5.7813
2001-03-31 5.2813
2001-06-30 5.3438
2001-09-30 4.3907
2001-12-31 4.0469
2002-03-31 4.3438
2002-06-30 4.25
2002-09-30 3.875
2002-12-31 3.915
2003-03-31 3.53
2003-06-30 3.515
2003-09-30 3.765
2003-12-31 4.11
2004-03-31 4.47
2004-06-30 4.98
2004-09-30 4.935
2004-12-31 4.85
2005-03-31 4.965
2005-06-30 4.645
2005-09-30 4.505
2005-12-31 4.53
2006-03-31 4.6
2006-06-30 4.76
2006-09-30 5.14
2006-12-31 5.385
2007-03-31 5.675
2007-06-30 6.075
2007-09-30 6.25
2007-12-31 5.86
2008-03-31 5.955
2008-06-30 6.11
2008-09-30 6.325
2008-12-31 3
2009-03-31 1.85
2009-06-30 1.425
2009-09-30 0.75
2009-12-31 0.825
2010-03-31 0.85
2010-06-30 1.02
2010-09-30 1.02
2010-12-31 1.045
2011-03-31 1.1
2011-06-30 1.13
2011-09-30 1.275
2011-12-31 1.395
2012-03-31 1.37
2012-06-30 1.195
2012-09-30 0.85
2012-12-31 0.665
2013-03-31 0.59
2013-06-30 0.575
2013-09-30 0.585
2013-12-31 0.585
2014-03-31 0.605
2014-06-30 0.675
2014-09-30 0.685
2014-12-31 0.675
2015-03-31 0.675
2015-06-30 0.79
2015-09-30 0.79
2015-12-31 0.79
2016-03-31 0.79
2016-06-30 0.785
2016-09-30 0.55
2016-12-31 0.565
2017-03-31 0.505
2017-06-30 0.49
2017-09-30 0.52