| Year | Value | | 2022 | 127.50899409194 | | 2021 | 116.55957549375 | | 2020 | 114.00306943483 | | 2019 | 112.71807281607 | | 2018 | 112.44079351774 | | 2017 | 112.01365777016 | | 2016 | 110.15088013411 | | 2015 | 108.51969823973 | | 2014 | 106.94048616932 | | 2013 | 108.57921207041 | | 2012 | 107.28415758592 | | 2011 | 105.0461022632 | | 2010 | 100 | | 2009 | 97.543987347286 | | 2008 | 99.181874175419 | | 2007 | 89.789795860248 | | 2006 | 85.826796961407 | | 2005 | 84.181274297245 | | 2004 | 81.469008688892 | | 2003 | 80.755691488053 | | 2002 | 83.686896603107 | | 2001 | 81.013357180103 | | 2000 | 78.388803878259 | | 1999 | 72.157086316316 | | 1998 | 73.694580123614 | | 1997 | 68.22703274617 | | 1996 | 45.758960514391 | | 1995 | 30.357413609131 | | 1994 | 20.883534009018 | | 1993 | 18.1317904889 | | 1992 | 12.242262510015 | | 1991 | 7.219011674678 | | 1990 | 4.5807282153802 | | 1989 | 3.444105335917 | | 1988 | 1.9050504771251 | | 1987 | 1.1885633200642 |
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