Year Percent 1963-01-01 37.836999999999996 1964-01-01 40.105700000000000 1965-01-01 38.277500000000000 1966-01-01 38.287600000000000 1967-01-01 41.954700000000000 1968-01-01 46.420300000000000 1969-01-01 48.867800000000000 1970-01-01 49.481900000000000 1971-01-01 47.285600000000000 1972-01-01 45.470800000000000 1973-01-01 45.195600000000000 1974-01-01 42.716200000000000 1975-01-01 44.307400000000000 1976-01-01 45.719500000000000 1977-01-01 45.377600000000000 1978-01-01 43.299600000000000 1979-01-01 42.717600000000000 1980-01-01 44.533200000000000 1981-01-01 48.427300000000000 1982-01-01 51.419000000000000 1983-01-01 52.327100000000000 1984-01-01 52.855700000000000 1985-01-01 56.550400000000000 1986-01-01 60.113100000000000 1987-01-01 63.212600000000000 1988-01-01 63.453900000000000 1989-01-01 66.048300000000000 1990-01-01 70.521700000000000 1991-01-01 74.283200000000000 1992-01-01 76.132900000000000 1993-01-01 71.759200000000000 1994-01-01 70.207100000000000 1995-01-01 71.068800000000000 1996-01-01 71.391000000000000 1997-01-01 72.203400000000000 1998-01-01 91.627100000000000 1999-01-01 107.384000000000000 2000-01-01 97.765600000000000 2001-01-01 103.057000000000000 2002-01-01 102.374000000000000 2003-01-01 103.461000000000000 2004-01-01 97.777700000000000 2005-01-01 93.722600000000000 2006-01-01 95.982100000000000 2007-01-01 96.747999999999990 2008-01-01 110.901000000000010 2009-01-01 118.527999999999990 2010-01-01 113.988000000000000 2011-01-01 115.981000000000010 2012-01-01 120.396000000000000 2013-01-01 120.753999999999990 2014-01-01 121.540000000000000 2015-01-01 118.437999999999990 2016-01-01 122.637000000000000