Year	Percent
1996-01-01	30.000000000000000
1997-01-01	23.529400000000000
1998-01-01	21.951200000000000
1999-01-01	20.454500000000000
2000-01-01	25.730999999999998
2001-01-01	29.787200000000000
2002-01-01	30.932200000000000
2003-01-01	35.789500000000000
2004-01-01	47.407400000000000
2005-01-01	49.350700000000000
2006-01-01	40.587400000000000
2007-01-01	36.842300000000000
2008-01-01	36.219100000000000
2009-01-01	39.261700000000000
2010-01-01	43.299000000000000
2011-01-01	45.645900000000000
2012-01-01	44.392100000000000
2013-01-01	44.089700000000000
2014-01-01	42.016100000000000