Year	Percent
1998-01-01	19.5000
1999-01-01	22.0000
2000-01-01	19.5000
2001-01-01	23.4000
2002-01-01	21.8000
2003-01-01	17.0000
2004-01-01	11.6000
2005-01-01	8.3000
2006-01-01	6.9000
2007-01-01	7.6000
2008-01-01	9.1000
2009-01-01	12.2000
2010-01-01	14.7475
2011-01-01	16.2072
2012-01-01	14.4709
2013-01-01	12.9869
2014-01-01	12.2658
2015-01-01	11.3589
2016-01-01	10.0558