Year	Percent
1998-01-01	94.987800000000000
1999-01-01	96.351400000000000
2000-01-01	93.934400000000000
2001-01-01	89.595700000000000
2002-01-01	79.919800000000000
2003-01-01	75.448000000000010
2004-01-01	67.778000000000000
2005-01-01	71.082600000000000
2006-01-01	72.573000000000010
2007-01-01	68.029100000000000
2008-01-01	69.615800000000000
2009-01-01	45.521100000000000
2010-01-01	29.488000000000003
2011-01-01	37.927500000000000
2012-01-01	29.173800000000000
2013-01-01	29.127900000000000
2014-01-01	28.371200000000000
2015-01-01	29.021900000000000
2016-01-01	28.473600000000000