Year | Value | 2021 | 1,724.9472096442 | 2020 | 1,209.2906103784 | 2019 | 1,253.9014637477 | 2018 | 1,418.451891438 | 2017 | 1,306.1252725179 | 2016 | 1,236.2090583622 | 2015 | 1,350.2088960266 | 2014 | 1,390.1149930685 | 2013 | 1,383.1900228907 | 2012 | 1,293.9687450346 | 2011 | 1,248.1745595603 | 2010 | 1,148.8425716207 | 2009 | 1,145.0103629531 | 2008 | 1,050.4228631617 | 2007 | 978.56454639686 | 2006 | 781.98655425391 | 2005 | 760.14521181614 | 2004 | 652.72955903791 | 2003 | 533.98145797097 | 2002 | 684.9329833549 | 2001 | 731.66498132587 | 2000 | 806.0009908866 | 1999 | 496.15304791652 | 1998 | 450.13132275744 | 1997 | 411.68870708033 | 1996 | 364.8887100328 | 1995 | 358.65570307738 | 1994 | 282.99822554509 | 1993 | 247.95714779512 | 1992 | 303.01426442281 | 1991 | 474.37904334933 | 1990 | 431.43512980438 | 1989 | 388.31664161574 | 1988 | 378.86582959965 | 1987 | 302.38082723539 | 1986 | 351.82283310671 | 1985 | 309.13726879438 | 1984 | 284.77643037012 | 1983 | 258.65478715522 | 1982 | 235.35845169508 | 1981 | 244.01591429678 | 1980 | 231.65987282999 |
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