Year | Value | 2021 | 2,791.017014001 | 2020 | 2,552.3494842099 | 2019 | 2,893.4908058346 | 2018 | 2,878.8663398212 | 2017 | 2,870.5766187475 | 2016 | 2,568.6777303211 | 2015 | 2,894.9839265172 | 2014 | 2,797.4878986999 | 2013 | 2,546.0459598784 | 2012 | 2,438.1743798123 | 2011 | 2,161.1760772283 | 2010 | 1,992.3737744893 | 2009 | 1,634.2099990421 | 2008 | 1,881.7925944421 | 2007 | 1,759.1502317228 | 2006 | 1,461.678407223 | 2005 | 1,524.9432464718 | 2004 | 1,471.9377511751 | 2003 | 1,367.6959037079 | 2002 | 1,191.4559661322 | 2001 | 1,148.2890801702 | 2000 | 1,166.6208669708 | 1999 | 1,218.7930984027 | 1998 | 1,275.0853388894 | 1997 | 1,267.2973085863 | 1996 | 1,061.1207191872 | 1995 | 1,070.4611510055 | 1994 | 1,001.2492661134 | 1993 | 878.46078902796 | 1992 | 952.29894417761 | 1991 | 940.64625832399 | 1990 | 639.01878012443 | 1989 | 615.97408080179 | 1988 | 614.98563821618 | 1987 | 520.60278735547 | 1986 | 410.2103035346 | 1985 | 428.5584214487 | 1984 | 552.62206097219 | 1983 | 666.49954963713 | 1982 | 657.97776188601 | 1981 | 613.92539128508 | 1980 | 638.16953717522 |
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