Year	Percent
1996-01-01	24.084200000000000
1997-01-01	19.857300000000000
1998-01-01	12.186100000000000
1999-01-01	13.298000000000000
2000-01-01	14.560200000000000
2001-01-01	12.036100000000000
2002-01-01	12.295000000000000
2003-01-01	12.584000000000001
2004-01-01	17.268000000000000
2005-01-01	18.646500000000000
2006-01-01	20.781000000000000
2007-01-01	20.988400000000000
2008-01-01	13.863600000000000
2009-01-01	12.821400000000000
2010-01-01	11.911700000000000
2011-01-01	10.956400000000000
2012-01-01	18.223400000000000
2013-01-01	23.990500000000000
2014-01-01	26.413400000000000
2015-01-01	26.363900000000000
2016-01-01	21.939100000000000