Year	Percent
1998-01-01	88.5498
1999-01-01	84.5839
2000-01-01	62.3000
2001-01-01	62.5000
2002-01-01	62.6430
2003-01-01	63.0383
2004-01-01	66.8040
2005-01-01	80.9770
2006-01-01	73.4889
2007-01-01	78.5893
2008-01-01	76.2307
2009-01-01	80.7508
2010-01-01	79.0615
2011-01-01	78.6400
2012-01-01	79.6057
2013-01-01	79.6057
2014-01-01	82.6038
2015-01-01	86.8156
2016-01-01	87.0010