Year Percent 1983-01-01 0.55284500000000000 1984-01-01 1.87460999999999990 1985-01-01 1.64157000000000000 1986-01-01 1.32507000000000000 1987-01-01 1.55186000000000000 1988-01-01 1.53302000000000000 1989-01-01 1.38137999999999980 1990-01-01 1.23066000000000000 1991-01-01 1.43596000000000010 1992-01-01 2.47820000000000000 1993-01-01 2.44733000000000000 1994-01-01 1.99099999999999990 1995-01-01 1.35399000000000000 1996-01-01 1.11414000000000000 1997-01-01 1.22887000000000010 1998-01-01 1.15072000000000000 1999-01-01 0.77031300000000000 2000-01-01 0.59981500000000000 2001-01-01 0.40712000000000000 2002-01-01 0.42157000000000000 2003-01-01 1.32495000000000000 2004-01-01 1.07677999999999980 2005-01-01 1.04951000000000000 2006-01-01 0.41962299999999997 2007-01-01 0.23281900000000000 2008-01-01 0.14200100000000000 2009-01-01 0.93841500000000000 2010-01-01 1.39263000000000000 2011-01-01 0.81694500000000000 2012-01-01 0.72258100000000000 2013-01-01 1.01337000000000000 2014-01-01 1.61222999999999980 2015-01-01 2.07538000000000000 2016-01-01 2.75600000000000020