Year	Percent
1996-01-01	59.284900000000000
1997-01-01	52.013100000000000
1998-01-01	56.053999999999995
1999-01-01	61.574400000000000
2000-01-01	69.149800000000000
2001-01-01	79.714800000000000
2002-01-01	77.676800000000000
2003-01-01	70.533900000000000
2004-01-01	71.732400000000000
2005-01-01	64.942100000000000
2006-01-01	45.544800000000000
2007-01-01	42.514800000000000
2008-01-01	42.645300000000000
2009-01-01	44.222700000000000
2010-01-01	43.563200000000000
2011-01-01	41.654200000000000
2012-01-01	39.538500000000000
2013-01-01	38.741000000000000
2014-01-01	38.490300000000000
2015-01-01	39.040200000000000
2016-01-01	38.701700000000000