Year Percent 1995-01-01 30.839500000000000 1996-01-01 79.143800000000000 1997-01-01 52.065700000000000 1998-01-01 42.824200000000000 1999-01-01 35.486300000000000 2000-01-01 55.668400000000000 2001-01-01 46.567500000000000 2002-01-01 67.738200000000000 2003-01-01 54.031000000000006 2004-01-01 62.673400000000000 2005-01-01 116.470000000000000 2006-01-01 47.689500000000000 2007-01-01 31.408500000000000 2008-01-01 30.482200000000000 2009-01-01 17.729700000000000 2010-01-01 16.318200000000000 2011-01-01 22.463500000000000 2012-01-01 8.930220000000000 2013-01-01 9.026460000000000 2014-01-01 3.279500000000000