Year | Value | 2021 | 608.96455253031 | 2020 | 557.22058747306 | 2019 | 568.38565997734 | 2018 | 539.71304083299 | 2017 | 465.57886330741 | 2016 | 467.37962575687 | 2015 | 451.95140489162 | 2014 | 417.57399189462 | 2013 | 476.05006603564 | 2012 | 503.36291090761 | 2011 | 528.2563172094 | 2010 | 627.80197075042 | 2009 | 611.04689040804 | 2008 | 687.18882217321 | 2007 | 587.03436932354 | 2006 | 499.85971967415 | 2005 | 508.96597628028 | 2004 | 490.48799677228 | 2003 | 234.78573669366 | 2002 | 293.80620949335 | 2001 | 372.94261373205 | 2000 | 442.13407936848 | 1999 | 476.24776127532 | 1998 | 504.9188774178 | 1997 | 499.32576478033 | 1996 | 551.89246697942 | 1995 | 526.82464611483 | 1994 | 518.22184186365 | 1993 | 543.45448286121 | 1992 | 534.11908712256 | 1991 | 540.58529257252 | 1990 | 236.76446556654 | 1989 | 229.91175307805 | 1988 | 246.65349643204 | 1987 | 239.00951636351 | 1986 | 212.8388150258 | 1985 | 260.73630549949 | 1984 | 188.09994270585 | 1983 | 214.97827647576 | 1982 | 236.08428330452 | 1981 | 246.41294711371 | 1980 | 287.15249557943 |
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