Year | Value | 2014 | 89.892956008176 | 2013 | 77.478851351332 | 2012 | 71.464794428028 | 2011 | 66.679695299136 | 2010 | 67.104421573131 | 2009 | 76.58094589708 | 2008 | 63.359548489975 | 2007 | 63.59797949231 | 2006 | 58.706435499194 | 2005 | 57.805990700386 | 2004 | 61.172284027744 | 2003 | 67.652786289115 | 2002 | 66.549681498079 | 2001 | 69.145837192434 | 2000 | 64.198390241842 | 1999 | 69.730034409196 | 1998 | 71.098017440157 | 1997 | 65.054490064421 | 1996 | 66.052790433703 | 1995 | 74.120030227202 | 1994 | 74.782543792792 | 1993 | 78.839343127298 | 1992 | 76.287158872492 | 1991 | 73.733596664617 | 1990 | 68.235678143047 | 1989 | 71.864163600623 | 1988 | 76.423908400828 | 1987 | 72.458110826641 | 1986 | 77.510078254683 | 1985 | 69.93475936059 | 1984 | 69.025333752309 | 1983 | 92.40760502871 | 1982 | 84.686165318538 | 1981 | 80.276499957925 | 1980 | 75.564651594604 | 1979 | 75.46344656946 | 1978 | 79.390926298356 | 1977 | 74.391674052381 | 1976 | 72.699772027475 | 1975 | 68.747142203932 | 1974 | 57.595381078818 | 1973 | 69.353610091054 | 1972 | 72.84966342558 | 1971 | 70.111303617368 | 1970 | 70.123594425757 | 1969 | 76.105265432232 | 1968 | 74.791938877201 | 1967 | 75.322762762763 | 1966 | 75.914313189594 | 1965 | 74.761502966381 | 1964 | 72.052361309875 | 1963 | 72.500155347045 | 1962 | 72.92599491956 | 1961 | 72.751258140912 | 1960 | 76.180125433368 |
|