Year Percent 1985-01-01 0.39561300000000000 1986-01-01 0.76621900000000000 1987-01-01 0.81937399999999990 1988-01-01 0.80159600000000000 1989-01-01 0.72861899999999990 1990-01-01 0.73095300000000000 1991-01-01 0.70634200000000000 1992-01-01 0.64437500000000000 1993-01-01 0.76503700000000000 1994-01-01 0.89480000000000000 1995-01-01 0.81476400000000000 1996-01-01 0.71679300000000000 1997-01-01 0.67452600000000010 1998-01-01 0.67452600000000010 1999-01-01 0.67452600000000010 2000-01-01 0.67452600000000010 2001-01-01 0.67452600000000010 2002-01-01 0.67452600000000010 2003-01-01 0.67452600000000010 2004-01-01 0.21305400000000000 2005-01-01 0.21305400000000000 2006-01-01 0.21305400000000000 2007-01-01 0.21305400000000000 2008-01-01 0.21305400000000000 2009-01-01 0.21305400000000000 2010-01-01 0.11262700000000000 2011-01-01 0.16105500000000000 2012-01-01 0.31738900000000000 2013-01-01 0.43575699999999995 2014-01-01 0.43575699999999995 2015-01-01 0.97108800000000000 2016-01-01 2.27472000000000000