Year	Percent
1999-01-01	47.408000000000000
2000-01-01	57.751800000000000
2001-01-01	57.330300000000000
2002-01-01	49.794400000000000
2003-01-01	52.052400000000000
2004-01-01	45.572300000000000
2005-01-01	54.612200000000000
2006-01-01	60.993100000000000
2007-01-01	55.028100000000000
2008-01-01	51.946000000000005
2009-01-01	45.648900000000000
2010-01-01	47.168900000000000
2011-01-01	42.746100000000000
2012-01-01	48.544700000000000
2013-01-01	46.551000000000000
2014-01-01	56.792700000000000