Year Percent 1995-01-01 0.17794300000000002 1996-01-01 0.19633000000000000 1997-01-01 0.20004000000000000 1998-01-01 0.22872199999999998 1999-01-01 0.23097500000000000 2000-01-01 0.21095200000000000 2001-01-01 0.25896800000000000 2002-01-01 0.26011799999999996 2003-01-01 0.23305300000000000 2004-01-01 0.25887700000000000 2005-01-01 0.26966700000000000 2006-01-01 0.27876999999999996 2007-01-01 0.36967400000000000 2008-01-01 0.45041499999999995 2009-01-01 0.40318400000000000 2010-01-01 0.49093400000000004 2011-01-01 0.75175800000000000 2012-01-01 0.77625200000000000 2013-01-01 0.79626000000000010 2014-01-01 0.86870600000000000 2015-01-01 0.83294500000000000 2016-01-01 0.90901100000000000