Year	Percent
1999-01-01	69.404000000000000
2000-01-01	64.778800000000000
2001-01-01	76.101100000000000
2002-01-01	68.619100000000000
2003-01-01	64.334300000000000
2004-01-01	60.442700000000000
2005-01-01	53.357000000000000
2006-01-01	43.778999999999996
2007-01-01	43.230000000000000
2008-01-01	42.346600000000000
2009-01-01	61.053100000000000
2010-01-01	60.596800000000000
2011-01-01	52.410200000000000
2012-01-01	53.947600000000000
2013-01-01	57.194200000000000
2014-01-01	60.300500000000000
2015-01-01	72.919300000000000
2016-01-01	81.961500000000000