Year Percent 1995-01-01 1.4886700000000002 1996-01-01 2.4933400000000003 1997-01-01 2.3202000000000000 1998-01-01 8.4409400000000000 1999-01-01 10.8741000000000000 2000-01-01 14.1902000000000000 2001-01-01 12.9748000000000000 2002-01-01 12.3312000000000000 2003-01-01 10.0649000000000000 2004-01-01 10.1989000000000000 2005-01-01 5.6384000000000000 2006-01-01 7.0908899999999990 2007-01-01 7.3734300000000000 2008-01-01 5.6110000000000010 2009-01-01 9.5725400000000000 2010-01-01 10.2742000000000000 2011-01-01 11.6980000000000000 2012-01-01 16.3514000000000000 2013-01-01 22.2543000000000000 2014-01-01 18.9914000000000000 2015-01-01 19.0090000000000000 2016-01-01 16.2583000000000000