Year Index 1980 35.583 1981 40.327 1982 45.158 1983 49.43 1984 53.223 1985 56.326 1986 57.756 1987 59.655 1988 61.267 1989 65.292 1990 65.503 1991 67.732 1992 69.395 1993 70.946 1994 72.127 1995 73.403 1996 74.928 1997 75.88 1998 76.391 1999 76.832 2000 78.226 2001 79.622 2002 81.164 2003 82.927 2004 84.863 2005 86.466 2006 88.102 2007 89.516 2008 92.346 2009 92.441 2010 94.047 2011 96.198 2012 98.329 2013 99.301 2014 99.91 2015 99.998 2016 100.304 2017 101.471 2018 103.603 2019 104.974 2020 106.598 2021 108.279 2022 110.172 2023 112.207 2024 114.325