Year	Percent
1996-01-01	35.220100000000000
1997-01-01	36.425000000000000
1998-01-01	33.556999999999995
1999-01-01	28.925600000000000
2000-01-01	28.982300000000000
2001-01-01	20.739500000000000
2002-01-01	19.850100000000000
2003-01-01	24.559000000000000
2004-01-01	24.309400000000000
2005-01-01	28.708600000000000
2006-01-01	26.261300000000000
2007-01-01	28.489100000000000
2008-01-01	29.226200000000000
2009-01-01	27.410700000000000
2010-01-01	29.281200000000000
2011-01-01	30.668700000000000
2012-01-01	30.157900000000000
2013-01-01	29.546700000000000
2014-01-01	30.088200000000000