| Year | Value | | 2014 | 157.58334053768 | | 2013 | 145.76915053315 | | 2012 | 131.3609055952 | | 2011 | 119.54356171311 | | 2010 | 100 | | 2009 | 89.948414157717 | | 2008 | 85.333767951035 | | 2007 | 71.723358754956 | | 2006 | 66.468912896806 | | 2005 | 59.965748218683 | | 2004 | 53.631222925988 | | 2003 | 47.66580240164 | | 2002 | 43.007116423029 | | 2001 | 38.317603512546 | | 2000 | 34.239173145372 | | 1999 | 32.736564820128 | | 1998 | 30.127460603963 | | 1997 | 28.428432889799 | | 1996 | 27.822806440627 | | 1995 | 21.282040789565 | | 1994 | 13.723167972597 | | 1993 | 9.1858800885278 | | 1992 | 6.7666479483204 | | 1991 | 5.2287734146112 | | 1990 | 3.844686334273 |
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