Year	Percent
1996-01-01	6.4553100000000000
1997-01-01	8.2445200000000000
1998-01-01	15.1559999999999990
1999-01-01	10.6134000000000000
2000-01-01	7.3296100000000010
2001-01-01	6.4808000000000000
2002-01-01	4.6648400000000000
2003-01-01	5.5913900000000005
2004-01-01	9.0145200000000000
2005-01-01	5.9689100000000000
2006-01-01	5.9243300000000000
2007-01-01	6.1163200000000000
2008-01-01	4.7837300000000000
2009-01-01	6.2810800000000000
2010-01-01	4.8382300000000000
2011-01-01	3.7614400000000003
2012-01-01	4.9948000000000000
2013-01-01	4.2094500000000000
2014-01-01	4.1501600000000000
2015-01-01	3.8028000000000000
2016-01-01	4.0009200000000000