| Year | Value | | 2022 | 177.30584109585 | | 2021 | 171.88042266406 | | 2020 | 168.78372148334 | | 2019 | 163.51694791292 | | 2018 | 159.06964122458 | | 2017 | 153.63165215668 | | 2016 | 148.40733280128 | | 2015 | 144.55037019429 | | 2014 | 143.64368992326 | | 2013 | 138.00672987429 | | 2012 | 129.47112002426 | | 2011 | 118.67773227707 | | 2010 | 100 | | 2009 | 91.568830608469 | | 2008 | 85.805303234615 | | 2007 | 69.694993103109 | | 2006 | 64.327239477577 | | 2005 | 59.884962675395 | | 2004 | 55.303319144004 | | 2003 | 51.323229636975 | | 2002 | 49.715120403179 | | 2001 | 47.880885839055 | | 2000 | 48.088408727697 | | 1999 | 48.925194568994 | | 1998 | 46.990545703914 | | 1997 | 43.807412363618 | | 1996 | 42.445125013985 | | 1995 | 40.16572038229 |
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