Year | Value | 2021 | 1,405.0167508729 | 2020 | 1,294.8950686729 | 2019 | 1,268.494152009 | 2018 | 1,296.7541425156 | 2017 | 1,214.2025250444 | 2016 | 1,122.0076508725 | 2015 | 1,079.8893891051 | 2014 | 1,234.4360268637 | 2013 | 1,209.901914126 | 2012 | 1,157.9343345534 | 2011 | 1,210.5024458101 | 2010 | 1,144.3653205293 | 2009 | 1,172.6816875248 | 2008 | 1,271.4314765512 | 2007 | 1,077.4359758207 | 2006 | 921.62688102336 | 2005 | 890.70600523288 | 2004 | 836.15369228335 | 2003 | 743.99013272042 | 2002 | 605.84927830934 | 2001 | 579.18508257679 | 2000 | 541.87424069556 | 1999 | 608.36300306763 | 1998 | 617.10908727002 | 1997 | 585.93503506627 | 1996 | 660.9948723105 | 1995 | 645.59671294548 | 1994 | 536.13052682698 | 1993 | 819.78027799249 | 1992 | 912.52354850994 | 1991 | 876.78771176179 | 1990 | 927.84483279128 | 1989 | 822.68807561392 | 1988 | 855.19332817614 | 1987 | 894.38466049511 | 1986 | 765.72422851894 | 1985 | 554.59144482228 | 1984 | 515.47441286389 | 1983 | 542.44011535432 | 1982 | 621.0299501592 | 1981 | 640.02462904568 | 1980 | 725.85664346449 | 1979 | 679.18390466897 | 1978 | 553.06213900082 | 1977 | 505.7319766966 | 1976 | 508.57711719313 | 1975 | 504.53517529729 | 1974 | 385.489923741 | 1973 | 356.19535530556 | 1972 | 324.14503468445 | 1971 | 275.72063974986 |
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