Year	Percent
1996-01-01	4.8911700000000000
1997-01-01	3.9163300000000003
1998-01-01	4.2768100000000000
1999-01-01	5.0132000000000000
2000-01-01	4.5249100000000000
2001-01-01	3.0836600000000000
2002-01-01	6.5190400000000000
2003-01-01	8.2001400000000000
2004-01-01	8.3448900000000000
2005-01-01	10.1462000000000000
2006-01-01	8.3898000000000000
2007-01-01	7.5145100000000005
2008-01-01	8.0584400000000000
2009-01-01	7.0579600000000005
2010-01-01	5.7932200000000000
2011-01-01	4.7497800000000000
2012-01-01	4.9291100000000000
2013-01-01	5.1519500000000000
2014-01-01	6.7659100000000010
2015-01-01	3.8735900000000000
2016-01-01	4.9363100000000000