Year	Percent
1998-01-01	48.195200000000000
1999-01-01	39.967800000000000
2000-01-01	28.713300000000000
2001-01-01	26.091800000000000
2002-01-01	22.488000000000003
2003-01-01	20.765700000000000
2004-01-01	20.485200000000000
2005-01-01	18.153300000000000
2006-01-01	16.701800000000000
2007-01-01	17.028000000000000
2008-01-01	14.219100000000000
2009-01-01	12.075900000000000
2010-01-01	10.609100000000000
2011-01-01	10.502900000000000
2012-01-01	10.714200000000000
2013-01-01	10.770900000000000
2014-01-01	11.354100000000000
2015-01-01	11.111300000000000
2016-01-01	10.915900000000000
2017-01-01	10.986400000000000