Quarter Percent 2003-06-30 3.6 2003-09-30 3.62 2003-12-31 3.84 2004-03-31 4.12 2004-06-30 4.55 2004-09-30 4.79 2004-12-31 4.8 2005-03-31 4.81 2005-06-30 4.77 2005-09-30 4.55 2005-12-31 4.61 2006-03-31 4.54 2006-06-30 4.65 2006-09-30 4.91 2006-12-31 5.22 2007-03-31 5.43 2007-06-30 5.87 2007-09-30 6.15 2007-12-31 6 2008-03-31 5.75 2008-06-30 5.51 2008-09-30 6 2008-12-31 2.25 2009-03-31 1.02 2009-06-30 0.65 2009-09-30 0.4 2009-12-31 0.41 2010-03-31 0.45 2010-06-30 0.57 2010-09-30 0.57 2010-12-31 0.58 2011-03-31 0.62 2011-06-30 0.62 2011-09-30 0.64 2011-12-31 0.76 2012-03-31 0.7 2012-06-30 0.54 2012-09-30 0.51 2012-12-31 0.49 2013-03-31 0.465