| Year | Value | | 2023 | 105.79533713429 | | 2022 | 104.39299469338 | | 2021 | 86.853827724819 | | 2020 | 92.58086046841 | | 2019 | 93.157494296236 | | 2018 | 90.141004892282 | | 2017 | 87.820417566324 | | 2016 | 85.199803636086 | | 2015 | 86.677941247465 | | 2014 | 90.109363135392 | | 2013 | 91.781143093947 | | 2012 | 88.242446007665 | | 2011 | 85.548756353869 | | 2010 | 84.444285797151 | | 2009 | 84.550104430427 | | 2008 | 80.259563048347 | | 2007 | 77.685573008337 | | 2006 | 78.201048462173 | | 2005 | 76.681572186082 | | 2004 | 71.492179983443 | | 2003 | 75.561284274666 | | 2002 | 75.566546224876 | | 2001 | 76.814963892506 | | 2000 | 75.337822492733 | | 1999 | 77.031168948651 | | 1998 | 81.456824929576 | | 1997 | 81.613024795159 | | 1996 | 79.881991437579 | | 1995 | 76.399991965723 | | 1994 | 67.834690875077 | | 1993 | 64.020421789537 | | 1992 | 63.552553149215 | | 1991 | 71.571906354515 | | 1990 | 73.652694610778 | | 1989 | 71.191081556816 |
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