Quarterly Percent
1987-03-31 7.69
1987-09-30 8.4
1987-12-31 7.4
1988-03-31 7.03
1988-06-30 7.9
1988-09-30 8.68
1988-12-31 9.33
1989-03-31 10.58
1989-06-30 9.01
1989-09-30 9.02
1989-12-31 8.2
1990-03-31 8.59
1990-06-30 8.28
1990-09-30 8.2
1990-12-31 7.46
1991-03-31 6.39
1991-06-30 6.45
1991-09-30 5.55
1991-12-31 4.13
1992-03-31 4.42
1992-06-30 3.97
1992-09-30 3.17
1992-12-31 3.54
1993-03-31 3.29
1993-06-30 3.41
1993-09-30 3.29
1993-12-31 3.41
1994-03-31 4.15
1994-06-30 5.15
1994-09-30 5.65
1994-12-31 6.91
1995-03-31 6.4
1995-06-30 5.87
1995-09-30 5.84
1995-12-31 5.44
1996-03-31 5.4
1996-06-30 5.69
1996-09-30 5.62
1996-12-31 5.5
1997-03-31 5.84
1997-06-30 5.8
1997-09-30 5.73
1997-12-31 5.74
1998-03-31 5.65
1998-06-30 5.69
1998-09-30 5.14
1998-12-31 4.98
1999-03-31 4.95
1999-06-30 5.4
1999-09-30 5.91
1999-12-31 6.05
2000-03-31 6.46
2000-06-30 6.95
2000-09-30 6.7
2000-12-31 6.14
2001-03-31 4.65
2001-06-30 3.85
2001-09-30 2.47
2001-12-31 1.92
2002-03-31 2.27
2002-06-30 1.89
2002-09-30 1.65
2002-12-31 1.32
2003-03-31 1.18
2003-06-30 1.06
2003-09-30 1.12
2003-12-31 1.17
2004-03-31 1.1
2004-06-30 1.9
2004-09-30 2.14
2004-12-31 2.73
2005-03-31 3.35
2005-06-30 3.67
2005-09-30 4.19
2005-12-31 4.66
2006-03-31 5.1
2006-06-30 5.55
2006-09-30 5.33
2006-12-31 5.32
2007-03-31 5.3
2007-06-30 5.35
2007-09-30 5.19
2007-12-31 4.66
2008-03-31 2.67
2008-06-30 3.17
2008-09-30 4.8
2008-12-31 1.78
2009-03-31 1.75
2009-06-30 1.11
2009-09-30 0.58
2009-12-31 0.43
2010-03-31 0.45
2010-06-30 0.8
2010-09-30 0.5
2010-12-31 0.56
2011-03-31 0.46
2011-06-30 0.4
2011-09-30 0.555
2011-12-31 0.81
2012-03-31 0.75
2012-06-30 0.72
2012-09-30 0.64
2012-12-31 0.51
2013-03-31 0.405