Year Percent 1994-01-01 10.2112000000000000 1995-01-01 5.9474800000000005 1996-01-01 4.0922500000000000 1997-01-01 2.5041400000000000 1998-01-01 2.4624000000000000 1999-01-01 1.9102900000000000 2000-01-01 3.6371400000000000 2001-01-01 3.8210800000000003 2002-01-01 14.0816000000000000 2003-01-01 16.9405000000000000 2004-01-01 19.3668000000000000 2005-01-01 46.9229000000000000 2006-01-01 55.9873000000000000 2007-01-01 90.5195000000000000 2008-01-01 60.5121000000000000 2009-01-01 65.4404000000000000 2010-01-01 60.8781000000000000 2011-01-01 55.0705000000000000 2012-01-01 60.3547000000000000 2013-01-01 59.1066000000000000 2014-01-01 48.6897000000000000 2015-01-01 52.7510000000000050 2016-01-01 51.8698000000000000