Year Percent 1995-01-01 70.4945000000000000 1996-01-01 86.0070000000000000 1997-01-01 28.6241000000000000 1998-01-01 33.5119000000000000 1999-01-01 30.3491000000000000 2000-01-01 23.5136000000000000 2001-01-01 30.4180000000000030 2002-01-01 20.3066000000000000 2003-01-01 7.2923899999999990 2004-01-01 8.8456000000000000 2005-01-01 5.3959800000000010 2006-01-01 9.1376100000000000 2007-01-01 13.0545000000000000 2008-01-01 6.2158600000000000 2009-01-01 8.8218700000000000 2010-01-01 4.5874300000000000 2011-01-01 6.2836200000000000 2012-01-01 6.4621300000000000 2013-01-01 5.9356500000000000 2014-01-01 10.0111000000000000 2015-01-01 5.9160699999999995 2016-01-01 5.4229600000000000