| Year | Value | | 2022 | 215.86458662441 | | 2021 | 200.43703917498 | | 2020 | 189.90553470878 | | 2019 | 179.67982174705 | | 2018 | 170.1642433841 | | 2017 | 161.22645891359 | | 2016 | 152.52914032228 | | 2015 | 144.55885088801 | | 2014 | 136.12677686136 | | 2013 | 127.23122878649 | | 2012 | 118.32116425041 | | 2011 | 111.39516515524 | | 2010 | 100 | | 2009 | 92.484115240665 | | 2008 | 87.726303420663 | | 2007 | 80.555313778397 | | 2006 | 73.831490991383 | | 2005 | 69.153102968056 | | 2004 | 64.600922621638 | | 2003 | 60.044987358421 | | 2002 | 56.823811557663 | | 2001 | 54.991194300326 | | 2000 | 53.909144115038 | | 1999 | 52.744412354129 | | 1998 | 49.708844392463 | | 1997 | 45.855920809106 | | 1996 | 43.545566759 | | 1995 | 42.534467582538 | | 1994 | 38.563292317803 | | 1993 | 36.617531851724 | | 1992 | 35.545887814397 | | 1991 | 34.299420491319 | | 1990 | 32.249220140246 | | 1989 | 30.387465668618 | | 1988 | 28.655125837091 | | 1987 | 26.677579319057 | | 1986 | 24.280002828766 |
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