Quarterly Percent
1981-03-31 14.625
1981-06-30 17.625
1981-09-30 17.875
1981-12-31 13.625
1982-03-31 15.5
1982-06-30 15.75
1982-09-30 10.4377
1982-12-31 9.25
1983-03-31 9.6875
1983-06-30 9.6875
1983-09-30 9.5
1983-12-31 9.9375
1984-03-31 10.688
1984-06-30 12.1875
1984-09-30 11.4375
1984-12-31 8.6875
1985-03-31 9.0625
1985-06-30 7.75
1985-09-30 8.1255
1985-12-31 7.9375
1986-03-31 7.375
1986-06-30 6.8125
1986-09-30 6.0625
1986-12-31 6.3125
1987-03-31 6.563
1987-06-30 7.125
1987-09-30 8.3125
1987-12-31 7.3755
1988-03-31 6.8125
1988-06-30 7.8755
1988-09-30 8.6255
1988-12-31 9.2505
1989-03-31 10.2815
1989-06-30 9.3438
1989-09-30 9.1563
1989-12-31 8.3438
1990-03-31 8.4688
1990-06-30 8.3438
1990-09-30 8.2813
1990-12-31 7.5313
1991-03-31 6.3438
1991-06-30 6.1563
1991-09-30 5.5938
1991-12-31 4.2188
1992-03-31 4.3125
1992-06-30 3.8425
1992-09-30 3.19
1992-12-31 3.3738
1993-03-31 3.19
1993-06-30 3.2513
1993-09-30 3.3125
1993-12-31 3.3125
1994-03-31 3.8738
1994-06-30 4.8125
1994-09-30 5.44
1994-12-31 6.44
1995-03-31 6.19
1995-06-30 5.94
1995-09-30 5.815
1995-12-31 5.535
1996-03-31 5.565
1996-06-30 5.47
1996-09-30 5.515
1996-12-31 5.495
1997-03-31 5.73
1997-06-30 5.72
1997-09-30 5.705
1997-12-31 5.685
1998-03-31 5.66
1998-06-30 5.62
1998-09-30 5.265
1998-12-31 5
1999-03-31 4.88
1999-06-30 5.35
1999-09-30 5.95
1999-12-31 5.98
2000-03-31 6.29
2000-06-30 6.76
2000-09-30 6.74
2000-12-31 6.35
2001-03-31 4.86
2001-06-30 3.8
2001-09-30 2.52
2001-12-31 1.83
2002-03-31 2
2002-06-30 1.83
2002-09-30 1.74
2002-12-31 1.345
2003-03-31 1.25
2003-06-30 1.09
2003-09-30 1.13
2003-12-31 1.1
2004-03-31 1.05
2004-06-30 1.56
2004-09-30 1.975
2004-12-31 2.56
2005-03-31 3.04
2005-06-30 3.505
2005-09-30 4.065
2005-12-31 4.505
2006-03-31 4.98
2006-06-30 5.46
2006-09-30 5.33
2006-12-31 5.34
2007-03-31 5.31
2007-06-30 5.345
2007-09-30 5.33
2007-12-31 4.77
2008-03-31 2.995
2008-06-30 2.99
2008-09-30 5.32
2008-12-31 1.41
2009-03-31 1.16
2009-06-30 0.92
2009-09-30 0.58
2009-12-31 0.48
2010-03-31 0.36
2010-06-30 0.9
2010-09-30 0.385
2010-12-31 0.43
2011-03-31 0.515
2011-06-30 0.26
2011-09-30 0.35
2011-12-31 0.68
2012-03-31 0.35
2012-06-30 0.515
2012-09-30 0.25
2012-12-31 0.415
2013-03-31 0.43
2013-06-30 0.32
2013-09-30 0.28
2013-12-31 0.32
2014-03-31 0.24
2014-06-30 0.29
2014-09-30 0.28
2014-12-31 0.425
2015-03-31 0.47
2015-06-30 0.4
2015-09-30 0.535
2015-12-31 0.76
2016-03-31 0.835
2016-06-30 1.06
2016-09-30 0.85
2016-12-31 0.995
2017-03-31 1.3
2017-06-30 1.35
2017-09-30 1.38
2017-12-31 1.76
2018-03-31 2.38
2018-06-30 2.39
2018-09-30 2.45
2018-12-31 2.87
2019-03-31 2.6
2019-06-30 2.31
2019-09-30 2.12
2019-12-31 1.92