Year	Percent
1996-01-01	31.405000000000000
1997-01-01	31.487900000000000
1998-01-01	24.087600000000000
1999-01-01	27.777800000000000
2000-01-01	27.190300000000000
2001-01-01	28.099200000000000
2002-01-01	30.481300000000000
2003-01-01	38.512000000000000
2004-01-01	33.082700000000000
2005-01-01	31.977600000000000
2006-01-01	33.597300000000000
2007-01-01	37.728200000000000
2008-01-01	30.473000000000003
2009-01-01	29.220800000000000
2010-01-01	31.267300000000000
2011-01-01	29.576200000000000
2012-01-01	30.782300000000000
2013-01-01	28.979900000000000
2014-01-01	29.885100000000000