| Year | Value | | 2022 | 136.76811353179 | | 2021 | 121.27612395366 | | 2020 | 117.57303619935 | | 2019 | 115.33898774877 | | 2018 | 112.34547369588 | | 2017 | 109.59033205832 | | 2016 | 108.17118465547 | | 2015 | 108.73662619879 | | 2014 | 109.0914130495 | | 2013 | 109.17456621764 | | 2012 | 107.66672210211 | | 2011 | 103.91928599146 | | 2010 | 100 | | 2009 | 99.052053883253 | | 2008 | 97.477687233217 | | 2007 | 93.192527301957 | | 2006 | 90.692388713343 | | 2005 | 86.800820444592 | | 2004 | 84.511336548589 | | 2003 | 78.579743888242 | | 2002 | 72.387604634403 | | 2001 | 70.192582737402 | | 2000 | 65.399078662897 | | 1999 | 58.373385997007 | | 1998 | 52.792939187316 | | 1997 | 49.493851654748 | | 1996 | 46.629850878652 | | 1995 | 44.083654858917 | | 1994 | 40.134026830756 | | 1993 | 35.386714895504 | | 1992 | 28.702707467155 | | 1991 | 26.118656799157 |
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