Quarter Percent 2003-06-30 3.61 2003-09-30 3.48 2003-12-31 3.72 2004-03-31 3.99 2004-06-30 4.34 2004-09-30 4.72 2004-12-31 4.78 2005-03-31 4.79 2005-06-30 4.79 2005-09-30 4.58 2005-12-31 4.54 2006-03-31 4.53 2006-06-30 4.6 2006-09-30 4.77 2006-12-31 5.07 2007-03-31 5.37 2007-06-30 5.58 2007-09-30 6.19 2007-12-31 6.14 2008-03-31 5.59 2008-06-30 5.49 2008-09-30 5.45 2008-12-31 4.24 2009-03-31 1.45 2009-06-30 0.76 2009-09-30 0.51 2009-12-31 0.42 2010-03-31 0.47 2010-06-30 0.53 2010-09-30 0.56 2010-12-31 0.57 2011-03-31 0.6 2011-06-30 0.6192 2011-09-30 0.6292 2011-12-31 0.7233 2012-03-31 0.7488 2012-06-30 0.5958 2012-09-30 0.5209 2012-12-31 0.4955 2013-03-31 0.4885