Year	Percent
1996-01-01	2.2227600000000000
1997-01-01	1.6198500000000000
1998-01-01	2.3691700000000000
1999-01-01	1.9044700000000000
2000-01-01	1.9758700000000000
2001-01-01	2.1552500000000000
2002-01-01	2.1281800000000000
2003-01-01	2.9676400000000003
2004-01-01	2.6607100000000000
2005-01-01	2.8174400000000000
2006-01-01	2.9111000000000000
2007-01-01	2.9294599999999997
2008-01-01	3.1153500000000000
2009-01-01	2.6760000000000000
2010-01-01	2.1820200000000000
2011-01-01	2.2342000000000000
2012-01-01	2.0794500000000000
2013-01-01	2.1913600000000000
2014-01-01	2.9034500000000000
2015-01-01	2.7850599999999996
2016-01-01	2.5469700000000000