| Year | Value | | 2023 | 2,036.406681 | | 2022 | 3,097.628821 | | 2021 | 3,240 | | 2020 | 2,306.166349 | | 2019 | 3,109.0430584471 | | 2018 | 2,482 | | 2017 | 2,840.9851350232 | | 2016 | 2,246.2270955747 | | 2015 | 2,074.830881067 | | 2014 | 2,084.318163 | | 2013 | 1,946.305597149 | | 2012 | 1,960 | | 2011 | 1,980 | | 2010 | 1,957.32853635 | | 2009 | 1,346.938 | | 2008 | 1,388.665 | | 2007 | 1,429.845 | | 2006 | 1,503.185 | | 2005 | 1,526.819 | | 2004 | 1,656.579 | | 2003 | 1,496.297 | | 2002 | 1,578.027 | | 2001 | 1,709.813 | | 2000 | 1,896.114 | | 1999 | 1,881.5999755859 | | 1998 | 1,805.6999511719 | | 1997 | 1,956.5 | | 1996 | 1,781 | | 1995 | 1,637.4000244141 | | 1994 | 1,478.5999755859 | | 1993 | 1,369.1999511719 | | 1992 | 1,249.6999511719 | | 1991 | 1,241.4000244141 | | 1990 | 1,385.3000488281 | | 1989 | 1,311.3000488281 | | 1988 | 1,170.5999755859 | | 1987 | 1,006.799987793 | | 1986 | 977 | | 1985 | 989.799987793 | | 1984 | 967.200012207 | | 1983 | 825.5999755859 | | 1982 | 746.5999755859 | | 1981 | 713.0999755859 | | 1980 | 688.5999755859 | | 1979 | 670.4000244141 | | 1978 | 608.5999755859 | | 1977 | 550.4000244141 | | 1976 | 567.700012207 |
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