Year | Value | 2015 | 96.31074869209 | 2014 | 96.002136776768 | 2013 | 96.626993515443 | 2012 | 96.996023966444 | 2011 | 97.294404974314 | 2010 | 97.19749711911 | 2009 | 97.196046821903 | 2008 | 97.059477688263 | 2007 | 97.204261091715 | 2006 | 97.363008333693 | 2005 | 97.567515989354 | 2004 | 97.99401814462 | 2003 | 98.077986911882 | 2002 | 98.013682464548 | 2001 | 97.956351705769 | 2000 | 98.100079894811 | 1999 | 98.29009829777 | 1998 | 98.231436581275 | 1997 | 98.632588410398 | 1996 | 98.82989690883 | 1995 | 98.584809481735 | 1994 | 98.725271152024 | 1993 | 98.80042178674 | 1992 | 98.744919621061 | 1991 | 99.15721257736 | 1990 | 99.150026692621 | 1989 | 98.928475413824 | 1988 | 98.799908230593 | 1987 | 98.854406067817 | 1986 | 99.131916501169 | 1985 | 98.997996646703 | 1984 | 98.959054271101 | 1983 | 98.974667404084 | 1982 | 99.02693449395 | 1981 | 99.027657083254 | 1980 | 99.173521445374 | 1979 | 99.311740389255 | 1978 | 99.397485231517 | 1977 | 99.346945632739 | 1976 | 99.897206249839 | 1975 | 99.838069907867 | 1974 | 99.845635894477 | 1973 | 99.908813794249 | 1972 | 99.865706254173 | 1971 | 99.883559800904 | 1970 | 99.79893113976 | 1969 | 99.819117163084 | 1968 | 99.77422143498 | 1967 | 99.759680272781 | 1966 | 99.778820616662 | 1965 | 99.764942988874 | 1964 | 99.823501838454 | 1963 | 99.994929200435 | 1962 | 99.88414783096 | 1961 | 99.8531302404 | 1960 | 99.947942424321 |
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