Year	Percent
1998-01-01	10.5000000000000000
1999-01-01	13.3000000000000000
2000-01-01	15.5000000000000000
2001-01-01	15.5000000000000000
2002-01-01	21.1000000000000000
2003-01-01	21.2000000000000000
2004-01-01	14.9000000000000000
2005-01-01	11.0000000000000000
2006-01-01	7.4000000000000000
2007-01-01	5.2000000000000000
2008-01-01	2.8000000000000000
2009-01-01	4.3000000000000000
2010-01-01	4.9124200000000000
2011-01-01	4.6628800000000000
2012-01-01	5.2020400000000000
2013-01-01	4.9779100000000000
2014-01-01	4.8238199999999996
2015-01-01	4.3415099999999995
2016-01-01	4.0485300000000000