Year	Percent
1996-01-01	40.262200000000000
1997-01-01	17.366500000000000
1998-01-01	11.370000000000000
1999-01-01	37.815400000000000
2000-01-01	41.315700000000000
2001-01-01	29.601200000000000
2002-01-01	22.015600000000000
2003-01-01	17.066900000000000
2004-01-01	27.786900000000000
2005-01-01	24.857600000000000
2006-01-01	21.613000000000003
2007-01-01	22.868500000000000
2008-01-01	23.133200000000000
2009-01-01	23.185300000000000
2010-01-01	21.104100000000000
2011-01-01	23.024100000000000
2012-01-01	21.346000000000000
2013-01-01	19.482800000000000
2014-01-01	19.650000000000000
2015-01-01	21.551900000000000
2016-01-01	19.929700000000000