| Year | Value | | 2022 | 111.06244582787 | | 2021 | 116.15343049212 | | 2020 | 121.8302010316 | | 2019 | 96.754501330833 | | 2018 | 95.14134261469 | | 2017 | 94.002035113379 | | 2016 | 94.877224535037 | | 2015 | 92.973104275004 | | 2014 | 91.985842044516 | | 2013 | 91.92033233874 | | 2012 | 90.411396977652 | | 2011 | 86.522111334575 | | 2010 | 82.248153144511 | | 2009 | 73.908281813384 | | 2008 | 62.236105423962 | | 2007 | 54.251080970691 | | 2006 | 54.427808492333 | | 2005 | 55.644331007364 | | 2004 | 55.820353158161 | | 2003 | 55.825304227157 | | 2002 | 53.886983699986 | | 2001 | 52.871817207908 | | 2000 | 35.442247195029 | | 1999 | 40.162121223006 | | 1998 | 43.806045468177 | | 1997 | 46.748031007895 | | 1996 | 49.413819746329 | | 1995 | 49.779661733965 | | 1994 | 47.353482170743 | | 1993 | 48.24614033356 | | 1992 | 46.050144417604 | | 1991 | 44.061597280603 | | 1990 | 40.933943570707 | | 1989 | 39.128400199944 |
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