Year	Percent
2000-01-01	45.8867686649722
2001-01-01	46.5200255016503
2002-01-01	46.5984922542550
2003-01-01	48.1514634217509
2004-01-01	48.0837465929582
2005-01-01	48.8113714405698
2006-01-01	52.8257303745722
2007-01-01	53.9472426680538
2008-01-01	54.0887891005967
2009-01-01	47.1876496223978
2010-01-01	44.9669961667443
2011-01-01	49.0679675367479
2012-01-01	50.3905430321357
2013-01-01	51.3702153311392