Year | Value | 2021 | 677.4184155207 | 2020 | 610.8568727237 | 2019 | 639.79119602037 | 2018 | 641.80099332411 | 2017 | 573.50252482796 | 2016 | 508.41210022953 | 2015 | 454.01910534186 | 2014 | 477.95730444909 | 2013 | 462.35260843539 | 2012 | 462.79894371419 | 2011 | 557.61071548477 | 2010 | 425.85115113761 | 2009 | 409.01004182489 | 2008 | 445.45120269087 | 2007 | 369.68256387665 | 2006 | 335.56455273558 | 2005 | 337.72467988194 | 2004 | 311.2150746687 | 2003 | 270.94434209696 | 2002 | 260.37707101393 | 2001 | 249.43792563361 | 2000 | 240.31439087861 | 1999 | 129.00381022287 | 1998 | 97.15039118389 | 1997 | 154.30601157643 | 1996 | 150.39044191383 | 1995 | 139.03014869819 | 1994 | 150.04193871197 | 1993 | 160.18777894171 | 1992 | 149.02951653804 | 1991 | 183.40077731392 | 1990 | 181.37192618383 | 1989 | 161.00314827908 | 1988 | 118.50941454919 | 1987 | 134.4991088657 | 1986 | 99.043261011298 | 1985 | 141.7038260059 | 1984 | 115.93973454151 | 1983 | 141.34277290455 | 1982 | 128.41047134091 | 1981 | 133.27596438125 | 1980 | 74.295510437001 |
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