Year	Percent
1996-01-01	4.0205500000000000
1997-01-01	3.9828300000000003
1998-01-01	5.1275500000000000
1999-01-01	2.6814299999999998
2000-01-01	4.0097600000000000
2001-01-01	4.3940300000000000
2002-01-01	8.8674500000000000
2003-01-01	7.2235100000000010
2004-01-01	6.8093800000000000
2005-01-01	6.5184600000000000
2006-01-01	8.2437600000000000
2007-01-01	6.7905600000000000
2008-01-01	5.3962200000000000
2009-01-01	6.5083800000000010
2010-01-01	5.0607200000000000
2011-01-01	5.3629300000000000
2012-01-01	5.5874900000000000
2013-01-01	5.3354800000000004
2014-01-01	4.3718200000000000
2015-01-01	5.1459000000000000
2016-01-01	4.2483600000000000