Year	Percent
1990-01-01	1.7973299999999999
1991-01-01	1.8515800000000000
1992-01-01	2.1955900000000000
1993-01-01	2.3409299999999997
1994-01-01	2.2719800000000000
1995-01-01	2.2556900000000000
1996-01-01	1.8692099999999998
1997-01-01	1.9761900000000001
1998-01-01	1.8773300000000000
1999-01-01	1.6907100000000000
2000-01-01	1.6338600000000000
2001-01-01	1.6013899999999999
2002-01-01	2.0868500000000000
2003-01-01	1.8925700000000000
2004-01-01	1.4969500000000000
2005-01-01	0.7281280000000000
2006-01-01	0.7135340000000000
2007-01-01	1.5603300000000000
2008-01-01	1.3374900000000000
2009-01-01	1.9088200000000002
2010-01-01	1.6656300000000000
2011-01-01	1.6426500000000000
2012-01-01	1.6544200000000000
2013-01-01	1.4893299999999998
2014-01-01	1.6742800000000000
2015-01-01	1.8967599999999998
2016-01-01	1.8475099999999998