Year	Percent
1996-01-01	41.6667
1997-01-01	42.8571
1998-01-01	42.8571
1999-01-01	46.3158
2000-01-01	47.3171
2001-01-01	50.8961
2002-01-01	49.5775
2003-01-01	45.0593
2004-01-01	50.5863
2005-01-01	59.3401
2006-01-01	53.4722
2007-01-01	45.1485
2008-01-01	49.7211
2009-01-01	60.6445
2010-01-01	61.7463
2011-01-01	56.7878
2012-01-01	59.8317
2013-01-01	62.6609
2014-01-01	56.2047