Year | Value | 2021 | 1,818.2606217863 | 2020 | 1,685.1110760937 | 2019 | 1,664.9536938389 | 2018 | 1,591.7747752729 | 2017 | 1,433.9648818323 | 2016 | 1,385.0399578844 | 2015 | 1,358.8569169291 | 2014 | 1,436.1305138083 | 2013 | 1,621.2046870342 | 2012 | 1,512.0953342959 | 2011 | 1,579.5106021299 | 2010 | 1,354.5036032147 | 2009 | 1,254.9508681588 | 2008 | 1,282.8912582796 | 2007 | 1,081.6108192726 | 2006 | 998.39726377346 | 2005 | 878.04790620374 | 2004 | 751.92510023738 | 2003 | 681.52805136807 | 2002 | 597.95589677769 | 2001 | 574.3914692977 | 2000 | 625.39777675991 | 1999 | 718.79284873163 | 1998 | 750.17388739325 | 1997 | 785.55416878243 | 1996 | 830.30324479962 | 1995 | 791.50200786688 | 1994 | 758.35923283638 | 1993 | 747.10254307255 | 1992 | 919.34308461478 | 1991 | 946.66833072563 | 1990 | 663.11489107606 | 1989 | 656.61659263973 | 1988 | 654.66286530347 | 1987 | 634.1192922784 | 1986 | 569.07296088834 | 1985 | 495.98245710865 | 1984 | 561.23502324538 | 1983 | 618.47020130829 | 1982 | 609.73718918891 | 1981 | 629.78073825755 | 1980 | 626.77144777161 |
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