Year	Percent
1996-01-01	49.5126
1997-01-01	50.0814
1998-01-01	55.8824
1999-01-01	51.3786
2000-01-01	50.7383
2001-01-01	48.5137
2002-01-01	47.1897
2003-01-01	53.6001
2004-01-01	50.6888
2005-01-01	54.9680
2006-01-01	56.4563
2007-01-01	53.0981
2008-01-01	56.8956
2009-01-01	55.4966
2010-01-01	52.5449
2011-01-01	53.0838
2012-01-01	50.9589
2013-01-01	56.0713
2014-01-01	57.1983