| Year | Value | | 2022 | 94.282581890014 | | 2021 | 95.748625712755 | | 2020 | 96.208300119218 | | 2019 | 97.525386632698 | | 2018 | 99.639799450049 | | 2017 | 99.48498844478 | | 2016 | 102.27019004953 | | 2015 | 101.47796591809 | | 2014 | 100.27836556344 | | 2013 | 101.30190023058 | | 2012 | 100.16617228081 | | 2011 | 98.96563707353 | | 2010 | 100.91974660778 | | 2009 | 99.71889291691 | | 2008 | 102.54919131354 | | 2007 | 101.6410121733 | | 2006 | 101.85226869151 | | 2005 | 102.71189334394 | | 2004 | 102.68456142828 | | 2003 | 102.08701693919 | | 2002 | 99.995769691425 | | 2001 | 99.914051699034 | | 2000 | 102.15475482666 | | 1999 | 102.44030704061 | | 1998 | 100.87757110855 | | 1997 | 99.725867442717 | | 1996 | 100.45276755349 | | 1995 | 101.9627061628 | | 1994 | 100.25760215683 | | 1993 | 100.70437912661 | | 1992 | 100.25137559625 | | 1991 | 99.539392421765 | | 1990 | 101.26984519206 | | 1989 | 101.41850519313 | | 1988 | 101.35070184736 | | 1987 | 103.07103470192 | | 1986 | 103.79005393553 | | 1985 | 102.16098006327 | | 1984 | 101.75865522308 | | 1983 | 103.01776022638 | | 1982 | 103.64273244739 | | 1981 | 102.49346932882 | | 1980 | 100.21171960895 | | 1979 | 101.86019486152 | | 1978 | 101.48108663786 | | 1977 | 101.11534983316 | | 1976 | 100.08518500744 | | 1975 | 99.472317732089 | | 1974 | 98.518935754282 | | 1973 | 97.418707346447 | | 1972 | 99.416346779806 | | 1971 | 100.43346874071 | | 1970 | 100.21948245495 | | 1969 | 101.7402985986 | | 1968 | 103.31747064261 | | 1967 | 101.66292630882 | | 1966 | 103.11295217784 | | 1965 | 102.36278187384 | | 1964 | 99.37414709896 | | 1963 | 100.81634775374 | | 1962 | 99.409714414212 | | 1961 | 102.4183452828 | | 1960 | 100.30096912057 |
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