Year | Value | 2021 | 854.79541443012 | 2020 | 807.18002603879 | 2019 | 790.41690082866 | 2018 | 794.589053988 | 2017 | 711.13956401273 | 2016 | 686.62237799774 | 2015 | 489.11695628859 | 2014 | 521.33861397965 | 2013 | 487.31852172451 | 2012 | 416.03731171979 | 2011 | 479.97698763298 | 2010 | 434.91813347303 | 2009 | 442.74521857922 | 2008 | 454.03208705167 | 2007 | 380.16319204655 | 2006 | 362.59235023639 | 2005 | 352.83843510917 | 2004 | 362.35908681382 | 2003 | 339.92591819829 | 2002 | 288.55388948716 | 2001 | 255.60033259338 | 2000 | 263.75480634586 | 1999 | 287.32236724788 | 1998 | 289.28276689664 | 1997 | 281.97914433748 | 1996 | 281.4805278433 | 1995 | 248.33346011404 | 1994 | 192.15175523522 | 1993 | 255.05852534001 | 1992 | 359.91556614025 | 1991 | 348.09195845456 | 1990 | 368.78440523044 | 1989 | 310.29707275067 | 1988 | 324.17186692595 | 1987 | 295.90418901518 | 1986 | 255.32453216613 | 1985 | 184.78111577009 | 1984 | 173.18618416956 | 1983 | 188.13300526093 | 1982 | 206.45515932512 | 1981 | 261.62770972497 | 1980 | 331.84048204597 | 1979 | 274.18990791143 | 1978 | 260.49311102241 | 1977 | 234.81484974553 | 1976 | 211.8538866986 | 1975 | 209.46458526447 | 1974 | 190.54970301993 |
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