Year | Value | 2014 | 97.682001292457 | 2013 | 97.555167051909 | 2012 | 97.608995163798 | 2011 | 97.701442763359 | 2010 | 97.6880328586 | 2009 | 97.932842248317 | 2008 | 98.246760780025 | 2007 | 98.128704398952 | 2006 | 98.302365849048 | 2005 | 98.172203063037 | 2004 | 98.713742428861 | 2003 | 98.404252408056 | 2002 | 98.156225452367 | 2001 | 98.168212559402 | 2000 | 98.917809325744 | 1999 | 98.88756526761 | 1998 | 98.988003007964 | 1997 | 99.085308181757 | 1996 | 98.973074864202 | 1995 | 98.927970381683 | 1994 | 99.08539199549 | 1993 | 98.888936735692 | 1992 | 98.637284122264 | 1991 | 98.453697452215 | 1990 | 99.391729351488 | 1989 | 99.174118646234 | 1988 | 99.173657163426 | 1987 | 99.083807108675 | 1986 | 99.024980833236 | 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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