Year Percent 1973-01-01 5.175619999999999000 1974-01-01 5.175619999999999000 1975-01-01 5.175619999999999000 1976-01-01 5.175619999999999000 1977-01-01 5.175619999999999000 1978-01-01 5.175619999999999000 1979-01-01 -0.669639000000000000 1980-01-01 -0.669639000000000000 1981-01-01 -0.669639000000000000 1982-01-01 -0.669639000000000000 1983-01-01 -0.669639000000000000 1984-01-01 -0.669639000000000000 1985-01-01 -0.669639000000000000 1986-01-01 -0.669639000000000000 1987-01-01 -0.669639000000000000 1988-01-01 -0.669639000000000000 1989-01-01 -0.669639000000000000 1990-01-01 -0.669639000000000000 1991-01-01 -0.669639000000000000 1992-01-01 -0.669639000000000000 1993-01-01 0.096053000000000000 1994-01-01 -0.046444000000000000 1995-01-01 -0.046444000000000000 1996-01-01 0.032727000000000000 1997-01-01 -0.492502999999999970 1998-01-01 -1.263720000000000200 1999-01-01 -0.623801000000000000 2000-01-01 -0.030757999999999997 2001-01-01 -0.030757999999999997 2002-01-01 -0.030757999999999997 2003-01-01 -0.030757999999999997 2004-01-01 -0.030757999999999997 2005-01-01 -0.030757999999999997 2006-01-01 2.552670000000000000 2007-01-01 2.552670000000000000 2008-01-01 2.552670000000000000 2009-01-01 2.552670000000000000 2010-01-01 0.545687000000000000 2011-01-01 -0.036799000000000000 2012-01-01 0.033902999999999996 2013-01-01 0.443382999999999970 2014-01-01 0.222128000000000020 2015-01-01 1.321750000000000000 2016-01-01 3.771120000000000000