Year Percent 1993-01-01 0.0678730000000000000 1994-01-01 0.0663040000000000000 1995-01-01 0.0393480000000000000 1996-01-01 0.0329570000000000000 1997-01-01 0.0305200000000000000 1998-01-01 0.0412089999999999960 1999-01-01 0.0396920000000000050 2000-01-01 0.0377150000000000000 2001-01-01 0.0246319999999999980 2002-01-01 0.0195160000000000000 2003-01-01 0.0151919999999999990 2004-01-01 0.0105140000000000000 2005-01-01 0.0078950000000000010 2006-01-01 0.0072299999999999994 2007-01-01 0.0062660000000000000 2008-01-01 0.0053500000000000000 2009-01-01 0.0068420000000000000 2010-01-01 0.0069800000000000000 2011-01-01 0.0162060000000000000 2012-01-01 0.0071510000000000000