Year	Percent
1996-01-01	2.1165200000000000
1997-01-01	1.7737800000000000
1998-01-01	2.2010600000000000
1999-01-01	1.6957000000000000
2000-01-01	1.5064400000000000
2001-01-01	0.9756850000000000
2002-01-01	1.1484200000000000
2003-01-01	1.2074600000000000
2004-01-01	2.0980300000000000
2005-01-01	1.8304799999999999
2006-01-01	0.2310260000000000
2007-01-01	1.1777100000000000
2008-01-01	1.0991799999999998
2009-01-01	1.4382800000000000
2010-01-01	2.3558400000000000
2011-01-01	1.2331299999999998
2012-01-01	1.5112600000000000
2013-01-01	1.4719200000000001
2014-01-01	1.4034500000000000
2015-01-01	1.7073200000000002
2016-01-01	1.9949400000000002