Year | Value | 2014 | 99.860473346201 | 2013 | 99.84744579808 | 2012 | 99.864917598262 | 2011 | 99.886419775506 | 2010 | 99.865014003816 | 2009 | 99.879921914338 | 2008 | 99.876913608739 | 2007 | 99.88223926824 | 2006 | 99.866370207937 | 2005 | 99.868293030777 | 2004 | 99.873257813043 | 2003 | 99.865965322424 | 2002 | 99.872174912283 | 2001 | 99.874512207245 | 2000 | 99.967304948833 | 1999 | 99.966388722244 | 1998 | 99.974688666924 | 1997 | 99.971056464295 | 1996 | 99.949009124254 | 1995 | 99.947654216537 | 1994 | 99.947127883663 | 1993 | 99.94615311768 | 1992 | 100 | 1991 | 100 | 1990 | 100 | 1989 | 100 | 1988 | 100 | 1987 | 100 | 1986 | 100 | 1985 | 100 | 1984 | 100 | 1983 | 100 | 1982 | 100 | 1981 | 100 | 1980 | 100 | 1979 | 100 | 1978 | 100 | 1977 | 100 | 1976 | 100 | 1975 | 100 | 1974 | 100 | 1973 | 100 | 1972 | 100 | 1971 | 100 |
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