Year Percent 1996-01-01 81.81820000000000 1997-01-01 90.90910000000000 1998-01-01 83.87100000000001 1999-01-01 88.88890000000000 2000-01-01 78.33330000000000 2001-01-01 83.12460000000000 2002-01-01 63.79450000000000 2003-01-01 68.26920000000000 2004-01-01 68.70550000000000 2005-01-01 72.49210000000000 2006-01-01 90.19610000000000 2007-01-01 64.54540000000000 2008-01-01 76.02040000000000 2009-01-01 75.64100000000000 2010-01-01 79.55560000000000 2011-01-01 86.98950000000000 2012-01-01 87.26420000000000 2013-01-01 77.02130000000000 2014-01-01 82.95450000000000