Quarterly Percent
1987-03-31 7.06
1987-09-30 7.63
1987-12-31 7.03
1988-03-31 6.69
1988-06-30 7.7
1988-09-30 8.25
1988-12-31 9.08
1989-03-31 9.95
1989-06-30 9.33
1989-09-30 9.02
1989-12-31 8.39
1990-03-31 8.28
1990-06-30 8.2
1990-09-30 8.18
1990-12-31 7.53
1991-03-31 6.23
1991-06-30 5.96
1991-09-30 5.35
1991-12-31 4.21
1992-03-31 4.14
1992-06-30 3.85
1992-09-30 3.1
1992-12-31 3.21
1993-03-31 3.1
1993-06-30 3.09
1993-09-30 3.09
1993-12-31 3.16
1994-03-31 3.6
1994-06-30 4.47
1994-09-30 4.97
1994-12-31 5.9
1995-03-31 6.04
1995-06-30 6.03
1995-09-30 5.78
1995-12-31 5.6
1996-03-31 5.34
1996-06-30 5.4
1996-09-30 5.33
1996-12-31 5.42
1997-03-31 5.6
1997-06-30 5.56
1997-09-30 5.56
1997-12-31 5.61
1998-03-31 5.58
1998-06-30 5.57
1998-09-30 5.27
1998-12-31 4.98
1999-03-31 4.83
1999-06-30 5.12
1999-09-30 5.36
1999-12-31 5.75
2000-03-31 6.07
2000-06-30 6.58
2000-09-30 6.56
2000-12-31 6.5
2001-03-31 5.02
2001-06-30 3.82
2001-09-30 2.57
2001-12-31 1.81
2002-03-31 1.82
2002-06-30 1.78
2002-09-30 1.75
2002-12-31 1.32
2003-03-31 1.25
2003-06-30 1.06
2003-09-30 1.06
2003-12-31 1.06
2004-03-31 1.04
2004-06-30 1.31
2004-09-30 1.8
2004-12-31 2.33
2005-03-31 2.83
2005-06-30 3.32
2005-09-30 3.83
2005-12-31 4.36
2006-03-31 4.79
2006-06-30 5.31
2006-09-30 5.29
2006-12-31 5.3
2007-03-31 5.29
2007-06-30 5.3
2007-09-30 5.17
2007-12-31 4.61
2008-03-31 2.73
2008-06-30 2.52
2008-09-30 5.25
2008-12-31 0.45
2009-03-31 0.6
2009-06-30 0.31
2009-09-30 0.24
2009-12-31 0.23
2010-03-31 0.23
2010-06-30 0.42
2010-09-30 0.26
2010-12-31 0.33
2011-03-31 0.25
2011-06-30 0.18
2011-09-30 0.22
2011-12-31 0.29
2012-03-31 0.33
2012-06-30 0.24
2012-09-30 0.21
2012-12-31 0.21
2013-03-31 0.205