Year	Percent
1998-01-01	41.662600000000000
1999-01-01	31.066000000000000
2000-01-01	30.407700000000000
2001-01-01	39.885000000000000
2002-01-01	64.240100000000000
2003-01-01	55.088800000000000
2004-01-01	56.153000000000000
2005-01-01	58.527900000000000
2006-01-01	56.030300000000000
2007-01-01	61.540900000000000
2008-01-01	54.582200000000000
2009-01-01	61.880700000000000
2010-01-01	62.728900000000000
2011-01-01	62.841200000000000
2012-01-01	58.797100000000000
2013-01-01	52.709300000000000
2014-01-01	22.000999999999998