Quarterly Percent
1988-03-31 6.69
1988-06-30 7.23
1988-09-30 8.08
1988-12-31 8.74
1989-03-31 9.51
1989-06-30 9.64
1989-09-30 8.91
1989-12-31 8.6
1990-03-31 8.24
1990-06-30 8.25
1990-09-30 8.06
1990-12-31 8.04
1991-03-31 6.71
1991-06-30 5.96
1991-09-30 5.7
1991-12-31 4.98
1992-03-31 4.13
1992-06-30 3.88
1992-09-30 3.29
1992-12-31 3.32
1993-03-31 3.09
1993-06-30 3.08
1993-09-30 3.08
1993-12-31 3.15
1994-03-31 3.31
1994-06-30 4.11
1994-09-30 4.63
1994-12-31 5.45
1995-03-31 5.97
1995-06-30 5.99
1995-09-30 5.8
1995-12-31 5.76
1996-03-31 5.34
1996-06-30 5.35
1996-09-30 5.36
1996-12-31 5.36
1997-03-31 5.36
1997-06-30 5.59
1997-09-30 5.55
1997-12-31 5.66
1998-03-31 5.55
1998-06-30 5.56
1998-09-30 5.52
1998-12-31 5.25
1999-03-31 4.85
1999-06-30 4.87
1999-09-30 5.19
1999-12-31 5.72
2000-03-31 5.86
2000-06-30 6.41
2000-09-30 6.57
2000-12-31 6.59
2001-03-31 5.45
2001-06-30 4.22
2001-09-30 3.19
2001-12-31 2.14
2002-03-31 1.79
2002-06-30 1.79
2002-09-30 1.76
2002-12-31 1.51
2003-03-31 1.28
2003-06-30 1.21
2003-09-30 1.06
2003-12-31 1.08
2004-03-31 1.05
2004-06-30 1.11
2004-09-30 1.55
2004-12-31 2.09
2005-03-31 2.59
2005-06-30 3.06
2005-09-30 3.56
2005-12-31 4.12
2006-03-31 4.58
2006-06-30 5.06
2006-09-30 5.32
2006-12-31 5.3
2007-03-31 5.29
2007-06-30 5.3
2007-09-30 5.43
2007-12-31 4.95
2008-03-31 3.32
2008-06-30 2.63
2008-09-30 2.72
2008-12-31 2.46
2009-03-31 0.57
2009-06-30 0.39
2009-09-30 0.28
2009-12-31 0.23
2010-03-31 0.22
2010-06-30 0.33
2010-09-30 0.31
2010-12-31 0.27
2011-03-31 0.26
2011-06-30 0.217
2011-09-30 0.2054
2011-12-31 0.2551
2012-03-31 0.3373
2012-06-30 0.2462
2012-09-30 0.2303
2012-12-31 0.2111
2013-03-31 0.2046