Year Percent 1995-01-01 0.6893310000000000 1996-01-01 0.9163500000000000 1997-01-01 4.2017000000000000 1998-01-01 6.4694300000000000 1999-01-01 8.9868200000000000 2000-01-01 9.2054300000000000 2001-01-01 7.0349200000000000 2002-01-01 6.4915199999999995 2003-01-01 6.8310400000000000 2004-01-01 6.2164300000000000 2005-01-01 5.2777199999999995 2006-01-01 6.7454500000000000 2007-01-01 4.0445600000000000 2008-01-01 2.8497200000000000 2009-01-01 2.6549200000000000 2010-01-01 2.5789999999999997 2011-01-01 3.1087000000000000 2012-01-01 1.6246300000000000 2013-01-01 1.4804400000000000