Year	Percent
1996-01-01	1.4581700000000000
1997-01-01	1.0208500000000000
1998-01-01	3.6655200000000000
1999-01-01	3.7747300000000004
2000-01-01	3.9698599999999997
2001-01-01	2.0097300000000000
2002-01-01	2.5657500000000000
2003-01-01	2.8608200000000000
2004-01-01	2.7806100000000000
2005-01-01	1.8758099999999998
2006-01-01	1.0126700000000002
2007-01-01	2.1629400000000003
2008-01-01	4.3109600000000000
2009-01-01	3.4429100000000000
2010-01-01	3.0484800000000000
2011-01-01	2.6682500000000000
2012-01-01	3.1442099999999997
2013-01-01	3.3036100000000000
2014-01-01	3.1655000000000000
2015-01-01	2.8344300000000000
2016-01-01	3.6389199999999997