Year	Percent
1996-01-01	2.9147400000000000
1997-01-01	7.7599800000000005
1998-01-01	4.9098400000000000
1999-01-01	5.2492199999999990
2000-01-01	5.6768700000000000
2001-01-01	5.2386800000000004
2002-01-01	5.4057500000000000
2003-01-01	5.6744500000000000
2004-01-01	5.1672400000000005
2005-01-01	5.0210700000000000
2006-01-01	4.7505900000000000
2007-01-01	4.5434900000000000
2008-01-01	4.7211200000000000
2009-01-01	5.6511700000000000
2010-01-01	7.8514100000000004
2011-01-01	5.3208600000000000
2012-01-01	4.2551800000000000
2013-01-01	5.2653300000000005
2014-01-01	4.8790400000000000
2015-01-01	4.0449000000000000
2016-01-01	6.6889000000000000