Year	Percent
1996-01-01	14.751700000000000
1997-01-01	15.883300000000000
1998-01-01	11.380700000000000
1999-01-01	15.031700000000000
2000-01-01	18.824100000000000
2001-01-01	19.565700000000000
2002-01-01	18.446500000000000
2003-01-01	19.294000000000000
2004-01-01	21.945800000000000
2005-01-01	25.760800000000000
2006-01-01	26.064900000000000
2007-01-01	23.832400000000000
2008-01-01	2.623030000000000
2009-01-01	9.391930000000000
2010-01-01	11.495000000000000
2011-01-01	10.494600000000000
2012-01-01	9.485669999999999
2013-01-01	7.741910000000001
2014-01-01	8.903720000000000
2015-01-01	8.788180000000000
2016-01-01	8.461430000000000