Year Percent 1996-01-01 17.2606 1997-01-01 16.5793 1998-01-01 15.7143 1999-01-01 22.2222 2000-01-01 40.0000 2001-01-01 40.0000 2002-01-01 43.3962 2003-01-01 28.0992 2004-01-01 36.6002 2005-01-01 40.4520 2006-01-01 35.4060 2007-01-01 32.6395 2008-01-01 53.9813 2009-01-01 38.0997 2010-01-01 47.1256 2011-01-01 27.8070 2012-01-01 47.3967 2013-01-01 37.6402 2014-01-01 75.7261