Year	Percent
2005-01-01	49.9856158478676
2006-01-01	50.8999801269747
2007-01-01	51.9880162964072
2008-01-01	52.7715364015280
2009-01-01	52.3839908786703
2010-01-01	52.6968627732379
2011-01-01	53.6246884751715
2012-01-01	53.9201009383290
2013-01-01	54.0404110499719