Year	Percent
1998-01-01	36.4000
1999-01-01	45.2000
2000-01-01	28.6000
2001-01-01	29.6000
2002-01-01	50.2000
2003-01-01	51.5000
2004-01-01	58.0000
2005-01-01	72.9000
2006-01-01	75.0000
2007-01-01	81.5000
2008-01-01	62.5000
2009-01-01	68.7000
2010-01-01	71.7168
2011-01-01	68.0753
2012-01-01	76.0354
2013-01-01	80.6384
2014-01-01	73.5193
2015-01-01	70.0585
2016-01-01	69.7426