Year Percent 1995-01-01 24.5104000000000000 1996-01-01 24.4279000000000000 1997-01-01 38.0344000000000000 1998-01-01 33.1419000000000000 1999-01-01 28.9867000000000000 2000-01-01 31.7502000000000000 2001-01-01 8.2550500000000000 2002-01-01 24.5856000000000000 2003-01-01 15.2625000000000000 2004-01-01 10.3273000000000000 2005-01-01 6.0653100000000000 2006-01-01 4.8783600000000000 2007-01-01 5.2770800000000010 2008-01-01 3.7062199999999996 2009-01-01 3.5407400000000000 2010-01-01 2.8881700000000000 2011-01-01 2.3237000000000000 2012-01-01 2.5963900000000000 2013-01-01 2.2102500000000000 2014-01-01 1.8341900000000002 2015-01-01 1.6228700000000000 2016-01-01 7.5036700000000000