| Year | Value | | 2024 | 96.542646357099 | | 2023 | 96.034062975395 | | 2022 | 63.579728659778 | | 2021 | 61.699827675252 | | 2020 | 60.251513696955 | | 2019 | 56.867415089468 | | 2018 | 88.074128846071 | | 2017 | 91.010113232292 | | 2016 | 101.47014117733 | | 2015 | 108.39372660934 | | 2014 | 103.17218220502 | | 2013 | 105.47098935906 | | 2012 | 113.97932665635 | | 2011 | 102.46651073783 | | 2010 | 105.07978668216 | | 2009 | 110.07677791278 | | 2008 | 121.45767315527 | | 2007 | 101.49204400586 | | 2006 | 109.33584247487 | | 2005 | 107.41978899839 | | 2004 | 102.5910303865 | | 2003 | 97.657272489312 | | 2002 | 98.14034120011 | | 2001 | 87.715223242267 | | 2000 | 84.18182497292 | | 1999 | 81.709538730598 | | 1998 | 80.976542679833 | | 1997 | 89.864073119288 | | 1996 | 80.34180543383 | | 1995 | 82.846099789178 | | 1994 | 78.188345360264 | | 1993 | 78.948570558453 | | 1992 | 89.019245003701 | | 1991 | 84.177654406662 | | 1990 | 82.552114276246 | | 1989 | 83.34287777617 | | 1988 | 77.908739666909 | | 1987 | 82.306787688765 | | 1986 | 79.41080626681 | | 1985 | 81.974448115239 | | 1984 | 83.582910407994 | | 1983 | 91.165725385935 | | 1982 | 88.345157108375 | | 1981 | 88.066685891002 | | 1980 | 87.713996212712 | | 1979 | 91.410395222027 | | 1978 | 88.167031877122 | | 1977 | 81.969745499598 | | 1976 | 81.979949851472 |
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