Year | Value | 2021 | 1,823.9029219527 | 2020 | 1,835.4034403042 | 2019 | 1,728.3921910505 | 2018 | 1,728.1659101031 | 2017 | 1,556.1538831976 | 2016 | 1,517.5100532222 | 2015 | 1,350.6952929389 | 2014 | 1,489.143890573 | 2013 | 1,839.7889570629 | 2012 | 1,151.2858763115 | 2011 | 1,143.8766987061 | 2010 | 1,023.8612528058 | 2009 | 855.42457110604 | 2008 | 977.87877651608 | 2007 | 866.15387674057 | 2006 | 739.30804789737 | 2005 | 376.21371520115 | 2004 | 310.828728494 | 2003 | 262.88326937284 | 2002 | 226.12055400089 | 2001 | 202.33114927389 | 2000 | 190.34971164958 | 1999 | 327.08618947799 | 1998 | 308.74865604239 | 1997 | 290.27275714417 | 1996 | 295.31420496921 | 1995 | 283.35198136758 | 1994 | 244.58205057713 | 1993 | 287.92337180916 | 1992 | 326.63797349443 | 1991 | 348.48417181593 | 1990 | 315.87395189089 | 1989 | 292.69779379217 | 1988 | 295.85813831397 | 1987 | 296.00443465632 | 1986 | 345.80804895498 | 1985 | 280.19508216749 | 1984 | 282.48550502089 | 1983 | 270.14942957452 | 1982 | 276.97626079459 | 1981 | 301.07789910829 | 1980 | 319.32296112921 | 1979 | 304.64986555501 | 1978 | 286.91767813742 | 1977 | 252.09224721745 | 1976 | 226.28055767035 | 1975 | 236.50659669648 | 1974 | 256.96227932254 | 1973 | 224.09836638852 | 1972 | 199.39563455389 | 1971 | 235.31703528608 |
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