| Year | Value | | 2022 | 103.76030377154 | | 2021 | 100.52053001657 | | 2020 | 100.26874360189 | | 2019 | 100.28938317738 | | 2018 | 99.980058570314 | | 2017 | 99.240317281806 | | 2016 | 99.194345113551 | | 2015 | 100.55388867917 | | 2014 | 102.5941238717 | | 2013 | 102.4104551872 | | 2012 | 101.64138167224 | | 2011 | 100.64603620593 | | 2010 | 98.661465794553 | | 2009 | 99.551035037896 | | 2008 | 99.658408734127 | | 2007 | 98.238341853617 | | 2006 | 98.70164669109 | | 2005 | 98.598163133625 | | 2004 | 98.091824173325 | | 2003 | 98.394560284719 | | 2002 | 98.736230851701 | | 2001 | 99.406004545438 | | 2000 | 98.635401855411 | | 1999 | 98.514571650458 | | 1998 | 98.25555538573 | | 1997 | 99.016126343816 | | 1996 | 99.622396730463 | | 1995 | 98.757183240081 | | 1994 | 98.130651979846 | | 1993 | 97.895511139989 | | 1992 | 97.981518609524 | | 1991 | 98.527081477737 | | 1990 | 99.235521903441 | | 1989 | 98.672033018636 | | 1988 | 98.070110136409 | | 1987 | 97.282766232757 | | 1986 | 96.397548002791 | | 1985 | 96.872518510097 | | 1984 | 97.603981185221 | | 1983 | 98.49869518735 | | 1982 | 99.463260490692 | | 1981 | 99.399597765461 | | 1980 | 100.95292059893 | | 1979 | 100.95421986002 | | 1978 | 98.257928626853 | | 1977 | 98.410507420024 | | 1976 | 99.35871930482 | | 1975 | 100.30142104915 | | 1974 | 101.50023035605 | | 1973 | 100.60152975648 | | 1972 | 98.002515238617 | | 1971 | 97.592031493506 | | 1970 | 99.301765351358 |
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