Year | Value | 2022 | 86.001667508578 | 2021 | 90.334518918896 | 2020 | 90.204378066005 | 2019 | 88.122036757871 | 2018 | 87.021819948925 | 2017 | 86.462617978645 | 2016 | 86.073678566641 | 2015 | 86.760457646768 | 2014 | 87.279162534876 | 2013 | 87.613503580977 | 2012 | 87.606518292057 | 2011 | 86.849117034178 | 2010 | 87.009225313924 | 2009 | 87.170786547663 | 2008 | 84.723873718576 | 2007 | 78.85984538284 | 2006 | 80.874052138018 | 2005 | 82.529626814965 | 2004 | 77.429045951234 | 2003 | 74.424772855234 | 2002 | 74.554413121513 | 2001 | 73.074615424633 | 2000 | 74.141558129315 | 1999 | 76.381336120246 | 1998 | 75.053045358895 | 1997 | 75.491303704074 | 1996 | 76.008002924042 | 1995 | 76.843822617547 | 1994 | 76.960173006531 | 1993 | 75.50122308204 | 1992 | 74.17744424614 | 1991 | 75.519555130263 | 1990 | 76.987829614604 | 1989 | 76.209653182665 | 1988 | 73.942753547397 | 1987 | 72.351581207167 | 1986 | 71.41116751269 | 1985 | 78.427006860031 | 1984 | 81.309192200557 | 1983 | 82.895870876753 | 1982 | 84.648187633262 | 1981 | 85.209129199726 | 1980 | 89.525123605841 | 1979 | 80.53664921466 | 1978 | 81.607542345797 | 1977 | 80.687247335538 | 1976 | 76.084183673469 |
|