Quarterly Percent
1987-03-31 7.68
1987-09-30 7.76
1987-12-31 7.2
1988-03-31 6.76
1988-06-30 7.77
1988-09-30 8.31
1988-12-31 9.14
1989-03-31 10.12
1989-06-30 9.26
1989-09-30 9.02
1989-12-31 8.32
1990-03-31 8.34
1990-06-30 8.21
1990-09-30 8.19
1990-12-31 7.52
1991-03-31 6.27
1991-06-30 6.03
1991-09-30 5.35
1991-12-31 4.16
1992-03-31 4.21
1992-06-30 3.85
1992-09-30 3.1
1992-12-31 3.28
1993-03-31 3.12
1993-06-30 3.15
1993-09-30 3.1
1993-12-31 3.22
1994-03-31 3.72
1994-06-30 4.65
1994-09-30 5.1
1994-12-31 6.16
1995-03-31 6.1
1995-06-30 5.97
1995-09-30 5.78
1995-12-31 5.54
1996-03-31 5.34
1996-06-30 5.44
1996-09-30 5.39
1996-12-31 5.44
1997-03-31 5.63
1997-06-30 5.61
1997-09-30 5.58
1997-12-31 5.65
1998-03-31 5.58
1998-06-30 5.59
1998-09-30 5.24
1998-12-31 4.98
1999-03-31 4.87
1999-06-30 5.18
1999-09-30 5.42
1999-12-31 5.82
2000-03-31 6.13
2000-06-30 6.63
2000-09-30 6.58
2000-12-31 6.43
2001-03-31 4.92
2001-06-30 3.8
2001-09-30 2.53
2001-12-31 1.8
2002-03-31 1.88
2002-06-30 1.79
2002-09-30 1.74
2002-12-31 1.32
2003-03-31 1.24
2003-06-30 1.06
2003-09-30 1.07
2003-12-31 1.08
2004-03-31 1.05
2004-06-30 1.44
2004-09-30 1.87
2004-12-31 2.43
2005-03-31 2.99
2005-06-30 3.42
2005-09-30 3.94
2005-12-31 4.45
2006-03-31 4.88
2006-06-30 5.39
2006-09-30 5.31
2006-12-31 5.31
2007-03-31 5.3
2007-06-30 5.31
2007-09-30 5.22
2007-12-31 4.66
2008-03-31 2.71
2008-06-30 2.72
2008-09-30 4.5
2008-12-31 1.12
2009-03-31 0.95
2009-06-30 0.42
2009-09-30 0.25
2009-12-31 0.24
2010-03-31 0.25
2010-06-30 0.45
2010-09-30 0.27
2010-12-31 0.35
2011-03-31 0.28
2011-06-30 0.19
2011-09-30 0.27
2011-12-31 0.42
2012-03-31 0.4
2012-06-30 0.34
2012-09-30 0.29
2012-12-31 0.26
2013-03-31 0.24