Year	Percent
1996-01-01	6.9728300000000000
1997-01-01	6.3097900000000005
1998-01-01	7.2454000000000000
1999-01-01	8.2696000000000000
2000-01-01	7.2852200000000000
2001-01-01	8.0211899999999990
2002-01-01	7.2611200000000000
2003-01-01	9.1845600000000010
2004-01-01	6.6776000000000000
2005-01-01	8.4047200000000000
2006-01-01	10.0556000000000000
2007-01-01	9.4859300000000000
2008-01-01	6.7360200000000000
2009-01-01	5.5767400000000000
2010-01-01	4.5980500000000000
2011-01-01	6.7442899999999995
2012-01-01	6.1150500000000000
2013-01-01	6.3713600000000000
2014-01-01	6.5852400000000000
2015-01-01	7.8126600000000000
2016-01-01	7.9299500000000000